IB Business Management SL 2026 — Operations Management

Videos on this page: Operations Methods · Lean Production & Quality Management

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The Role of Operations Management

Operations management is the function responsible for transforming inputs (resources) into outputs (goods and services) as efficiently and effectively as possible. It sits at the core of every business — without operations, there is no product or service to sell, market, or finance. Operations management decisions directly affect costs, quality, capacity, and the business’s ability to compete.

The Transformation Model

The transformation model frames operations as a system with three components:

• Inputs — the resources used in production. These fall into two categories:
  • Transforming resources (the tools of production): land, labour, capital, and enterprise — the four factors of production.
  • Transformed resources (what is worked on): raw materials, data, customers (in service operations), and information.
• Transformation process — the activities that convert inputs into outputs: manufacturing, assembly, chemical processing, information processing, or service delivery.
• Outputs — the finished goods or services delivered to customers.

The goal of operations management is to maximise the value added during the transformation — the difference between the cost of inputs and the value of outputs — while minimising waste, time, and cost.

Operations and the Value Chain

Operations management is central to value creation. Each stage of the transformation process should add utility — the value perceived by the customer:

• Form utility — changing the physical form of inputs (e.g., turning timber into furniture)
• Time utility — making the product available when the customer needs it (e.g., rapid delivery)
• Place utility — making the product available where the customer needs it (e.g., a convenience store)
• Possession utility — enabling the customer to own and use the product

Operations and Business Strategy

Operations does not exist in isolation — it must align with the business’s competitive strategy:

• Cost leadership strategy — operations must focus on minimising unit costs through high-volume production, automation, and lean systems (e.g., IKEA’s flat-pack global supply chain)
• Differentiation strategy — operations must prioritise quality, customisation, and speed, even at higher cost (e.g., bespoke furniture craftsmen, Rolls-Royce cars)

Key Operations Objectives

Objective	Description	Example trade-off
Cost	Minimise the unit cost of production	Low cost may compromise quality
Quality	Produce outputs that meet or exceed customer expectations	High quality typically raises cost
Speed	Deliver products quickly to customers	Speed may increase cost or reduce flexibility
Flexibility	Adapt production to changing demand or product specifications	Flexibility often increases unit cost
Dependability	Deliver reliably — right product, right time, every time	Hard to maintain under volatile demand
Sustainability	Minimise environmental impact; responsible resource use	May increase short-run cost

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Operations Methods

Three main production methods exist: job, batch, and flow (mass) production. The correct choice depends on the nature of the product, the size of the market, the degree of standardisation required, and the capital available.

Job Production

In job production, each product is made individually to a unique specification, from start to finish, before the next item is started. The product is usually made to a specific customer’s requirements.

Characteristics: highly customised; high skill requirement; small quantities; labour-intensive.

Advantages:

• Products can be tailored exactly to customer requirements — maximum flexibility
• High-quality craftsmanship is possible and expected
• Customer satisfaction from bespoke service; often commands premium prices
• Workers develop high levels of skill and variety in their work, which can improve motivation

Disadvantages:

• Very high unit costs — cannot achieve economies of scale
• Slow production — each product completed individually before the next begins
• Highly skilled (and therefore expensive) labour is required
• Difficult to achieve consistent output or expand rapidly to meet increased demand

Examples: bespoke wedding cakes, custom suits, cruise ships, individually designed architecture, specialised medical equipment, handmade jewellery, bespoke software development.

Batch Production

In batch production, a group (batch) of similar items is produced together, moving through each stage of production as a group before moving to the next stage. Each batch may be slightly different from the last — for example, a bakery produces a batch of white loaves, then resets machines and produces a batch of wholemeal loaves.

Characteristics: semi-customised; medium-scale; batches allow variety within a standardised system; machines are reset between batches.

Advantages:

• More efficient than job production — within a batch, the process is standardised
• Variety is possible — different batches can have different specifications
• Some economies of scale achievable within each batch
• More flexible than flow production — different product types can be produced in sequence

Disadvantages:

• Machine changeover (set-up) costs and time between batches — production is interrupted
• Partially completed stock (WIP — work-in-progress) accumulates between stages as batches wait to move forward
• Scheduling is complex — managing multiple product lines simultaneously
• Storage costs rise as completed batches await distribution or sale

Examples: bakeries (batch of loaves), pharmaceutical tablets and capsules, seasonal clothing runs, printed books, school furniture.

Flow (Mass) Production

In flow (mass) production, identical, standardised products move continuously along an assembly line, with each workstation performing a specific repetitive task. Production is continuous — the line never stops.

Characteristics: very high volume; fully standardised products; highly capital-intensive; requires large initial investment; very low unit costs.

Advantages:

• Very low unit costs due to economies of scale and high throughput
• Extremely fast output — products roll off the line continuously
• Consistent product quality — standardised process reduces variation
• Less skilled (and therefore lower-cost) labour required for individual tasks

Disadvantages:

• Very high initial capital investment in machinery and the production line itself
• Inflexible — changing the product specification requires costly re-engineering of the line
• Repetitive, routine work leads to low worker morale, high absenteeism, and turnover
• Vulnerable to machine breakdown — one failure can halt the entire line
• Large minimum production runs required — unsuitable for small markets

Examples: Ford car assembly, Coca-Cola bottling, microchip manufacturing, mass-market textbook printing.

Production Methods Comparison Table

Feature	Job Production	Batch Production	Flow (Mass) Production
Volume	Single unit	Groups (batches)	Continuous/very high
Customisation	Fully bespoke	Semi-customised	Standardised
Unit cost	Very high	Medium	Very low
Skill required	High	Medium	Low (per task)
Flexibility	Maximum	Moderate	Very low
Capital intensity	Low	Medium	Very high
Labour intensity	Very high	High	Low
Worker motivation	High (variety, skill)	Moderate	Low (repetition)
Examples	Bespoke suit, cruise ship	Bread batch, pharma tablets	Coca-Cola, microchips

Cell Production

Cell production is a hybrid approach in which the factory floor is organised into U-shaped work cells, each producing a complete product or sub-assembly from start to finish. Workers within a cell are multi-skilled and handle multiple stages of production.

Advantages: improves worker motivation (each cell has ownership of a complete product); encourages teamwork; reduces WIP stock between stages; quality responsibility lies with the cell team.

Disadvantages: workers require training in multiple skills; cells may have different throughput speeds, creating imbalances; initial reorganisation costs can be significant.

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Watch: Operations Methods

lewwinski · 17 min · Job, batch, mass/flow, and customisation production methods — IB unit 5.2

Lean Production and Quality Management

Lean production is a philosophy of manufacturing that seeks to eliminate all forms of waste (known in Japanese as muda) from the production process. Originating in Japan’s Toyota Production System (TPS) in the 1950s and 1960s, lean thinking transformed manufacturing worldwide.

Types of Waste (Muda)

Lean production identifies seven classical forms of waste:

1. Overproduction — making more than is currently needed, creating excess inventory
2. Waiting — idle time when workers or machines are not adding value
3. Transport — unnecessary movement of materials between locations
4. Over-processing — doing more work on a product than the customer values
5. Inventory — holding excess stock that ties up cash and risks obsolescence
6. Motion — unnecessary movement by workers (poor layout, missing tools)
7. Defects — producing faulty products that must be reworked or scrapped

Just-in-Time (JIT) Production

Just-in-Time (JIT) is a stock management and production philosophy in which materials and components are ordered or produced only when they are needed — not before. The goal is zero buffer stock: nothing sits in a warehouse waiting.

How JIT works: Production is demand-driven (“pull” system) — products are made only when a customer order is received or a downstream workstation signals a need. Suppliers are closely integrated and must deliver small quantities frequently, precisely when needed (known as “kanban” signalling).

Advantages of JIT:

• Significantly reduces storage and warehousing costs (no large buffer stock needed)
• Reduces working capital tied up in inventory
• Defects are identified immediately — a faulty component cannot hide in a pile of stock
• Waste (overproduction, excess inventory) is minimised
• Improves cash flow — the business pays for inputs closer to when it receives revenue

Disadvantages of JIT:

• Entirely dependent on reliable suppliers who can deliver exact quantities at precise times
• No buffer stock means any supply chain disruption halts production immediately
• Vulnerable to unexpected surges in demand — cannot quickly increase output
• Requires very close supplier relationships and sophisticated communication systems
• Higher ordering and delivery frequency may increase unit transport costs

Kaizen (Continuous Improvement)

Kaizen (Japanese: “change for the better”) is the philosophy of continuous, incremental improvement involving all employees at every level of the organisation — not just management or engineers.

Core principles of Kaizen:

• Small improvements are made constantly, every day, by everyone
• Every employee is empowered to identify inefficiencies and suggest solutions
• No improvement is too small to matter
• Changes are made, measured, and refined in a cycle (Plan-Do-Check-Act / PDCA)

Kaizen events (or “blitzes”) are focused, short-duration improvement sessions where a small team concentrates on eliminating waste in a specific process over a few days.

Kaizen vs Innovation:

	Kaizen	Innovation
Type of change	Many small, incremental steps	Few large, radical leaps
Driven by	All employees	R&D teams, senior management
Risk	Very low	High
Cost	Low	High
Speed	Gradual, sustained	Sudden, disruptive
Example	Reducing machine set-up time by 3 minutes	Introducing a completely new robotic assembly line

Total Quality Management (TQM)

Total Quality Management (TQM) is a management philosophy in which every employee at every stage of the production process takes responsibility for quality. Rather than detecting defects at the end of the line, TQM builds quality into the process from the start.

Core TQM principles:

• Zero defect target — the objective is to get it right first time, every time
• Customer focus — quality is defined by what the customer values, not internal standards
• Continuous improvement — quality is never “good enough”; improvement is always possible
• Employee involvement — every worker is a quality inspector for their own output

Quality circles are a practical TQM tool: small groups of employees (typically 5–10) who meet regularly (often weekly) to identify quality problems in their area, analyse causes, and propose solutions. Participation is voluntary; recommendations are presented to management for approval. Quality circles bridge the gap between operational workers (who see day-to-day problems) and management (who have authority to implement changes).

Quality Control vs Quality Assurance vs TQM

This is one of the most frequently tested distinctions in Unit 5:

	Quality Control (QC)	Quality Assurance (QA)	Total Quality Management (TQM)
Definition	Inspecting finished products AFTER production to identify defects	Systems and processes throughout production to PREVENT defects occurring	Company-wide philosophy where every employee is responsible for quality at every stage
Approach	Reactive — detects defects	Proactive — prevents defects	Cultural — embeds quality in all activities
When applied	End of production line	Throughout the production process	At every stage, by everyone
Who is responsible?	Quality inspectors (specialist)	All staff involved in the process	Every employee
Waste	Defective units already produced — resources wasted	Fewer defective units — less waste	Zero defect target — minimum waste
Cost	High — scrapping/reworking defective units	Lower long-run cost	High cultural investment but lower long-run defect cost
Example	Final inspection at end of assembly line	ISO 9001 certification; documented processes	Toyota Production System; Kaizen culture

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Watch: Lean Production & Quality Management

Diplomaly · 14 min · TQM, quality control vs quality assurance, kaizen, JIT, benchmarking — IB unit 5.3

Location of Production

Where a business locates its operations is a strategic decision with long-lasting consequences. Location affects costs, market access, labour availability, legal environment, and brand perception. The wrong location choice can be difficult and expensive to reverse.

Why Location Matters

Location decisions directly affect:

• Fixed costs (rent and property prices vary enormously between locations)
• Labour costs and availability (wage rates, skill levels, and the size of the local labour pool)
• Transport costs (proximity to raw materials, suppliers, and customers)
• Market access (ability to reach target customers quickly and cheaply)
• Legal and regulatory environment (tax rates, planning regulations, environmental law)

Quantitative Factors

Quantitative factors are measurable in monetary terms and can be compared directly across locations:

• Land and property costs — the biggest cost difference between locations, especially for manufacturing and warehousing. Urban sites cost far more than rural or overseas alternatives.
• Labour costs and availability — wage rates differ significantly between countries and regions. Low-cost manufacturing in South-East Asia vs higher-cost operations in Western Europe.
• Infrastructure — quality of transport networks (roads, ports, rail), energy supply, broadband connectivity. Poor infrastructure raises transport costs and reduces efficiency.
• Government incentives — grants, tax breaks, subsidised premises, and enterprise zones offered by governments to attract investment into target areas.
• Proximity to raw materials — critical for primary and secondary sector businesses. A steel plant near iron ore deposits avoids expensive transport costs.
• Proximity to markets (customers) — critical for businesses where quick delivery is important (fresh food, retail) or where transport costs are high relative to product value.

Qualitative Factors

Qualitative factors are harder to measure in monetary terms but can be decisive:

• Quality of life — areas with good schools, housing, amenities, and natural environment attract skilled workers and senior managers
• Political stability — risk of expropriation, corruption, or sudden regulatory changes in some international locations
• Cultural factors — language barriers, business customs, and attitudes toward employment relations vary across countries
• Personal preferences of owner — particularly for small businesses, the owner’s desire to operate in a particular location (e.g., near home) may override financial considerations

The Weighted Scoring Model

The weighted scoring model is a quantitative decision-making tool that allows a business to systematically compare locations by assigning different levels of importance (weights) to each factor.

Steps:

1. List the key location factors
2. Assign a weight to each factor — the weights must sum to 100 (or 1.0)
3. Score each location on each factor (e.g., 1–10, where 10 is best)
4. Multiply each score by its weight to produce a weighted score
5. Sum the weighted scores for each location — the highest total wins

Globalisation, Offshoring, and Outsourcing

Offshoring is the relocation of production or business functions to a different country, typically one with lower operating costs.

	Advantages of Offshoring	Disadvantages of Offshoring
Costs	Lower labour costs (e.g., manufacturing in Vietnam vs UK)	Higher transport and logistics costs
Market access	Closer to growing markets in Asia, Latin America	Trade barriers, tariffs, customs delays
Quality	May access specialist skills	Harder to monitor and control quality at distance
Reputation	—	Reputational risk if poor labour conditions are exposed
Communication	—	Time zone and language barriers increase coordination cost
Control	—	Intellectual property risk in some jurisdictions

Outsourcing is contracting out a business function or process to an external provider, rather than performing it in-house. The function may be outsourced domestically or overseas.

Advantages of outsourcing:

• Access to specialist expertise that the business cannot develop internally
• Cost savings — the external provider can spread costs across many clients
• Flexibility — contracts can be renegotiated or ended as needs change
• Allows management to focus on core competencies

Disadvantages of outsourcing:

• Loss of direct control over the quality of the outsourced function
• Dependence on the supplier — if they fail, the business cannot easily bring the function back in-house quickly
• Risk of confidential information being shared beyond the business
• Potential job losses damage employee morale and public reputation

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Break-even Analysis in Operations Context

Break-even analysis was introduced in Unit 3 (Finance and Accounts) as a financial planning tool. In the operations context, it serves a direct function: helping production managers decide minimum output targets, evaluate the financial impact of capacity decisions, and assess the effect of changing input costs on viability.

Key Definitions

• Fixed costs (FC) — costs that do not change with the level of output: rent, insurance, management salaries, equipment leasing, loan repayments.
• Variable costs (VC) — costs that vary directly with output: raw materials, direct labour (if paid per unit), packaging, energy used in production.
• Total costs (TC) = FC + (VC per unit × Quantity)
• Revenue (TR) = Selling price × Quantity
• Contribution per unit = Selling price − Variable cost per unit. This is the amount each unit sold contributes first toward covering fixed costs, then toward profit.
• Break-even point (BEP) = the output level at which TR = TC — no profit and no loss.
• Margin of Safety (MoS) = current output − BEP = the number of units by which actual output can fall before the business makes a loss.

The Break-even Chart

A break-even chart plots costs and revenue against output level:

• X-axis: output / sales volume (units)
• Y-axis: costs and revenue (currency, e.g., $)
• Fixed cost line: horizontal — starts from the y-axis at the FC value; does not slope because fixed costs do not change with output
• Total cost line: starts from the same point as FC on the y-axis (because at zero output, total costs = fixed costs) and slopes upward; the gradient = variable cost per unit
• Revenue line: starts from the origin (zero revenue at zero output) and slopes upward; the gradient = selling price per unit
• Break-even point: where the total cost line and revenue line intersect
• Profit area: to the right of the BEP — revenue exceeds total costs
• Loss area: to the left of the BEP — total costs exceed revenue

The Effect of Changing Variables

IB examiners frequently ask how a change in fixed costs, variable costs, or selling price affects the break-even point. The key relationships are:

Change	Effect on BEP	Visual effect on chart
Fixed costs increase	BEP rises (more units needed to cover higher FC)	FC and TC lines shift upward; BEP moves right
Fixed costs decrease	BEP falls	FC and TC lines shift down; BEP moves left
Variable cost per unit increases	Contribution falls → BEP rises	TC line becomes steeper; BEP moves right
Selling price increases	Contribution rises → BEP falls	Revenue line becomes steeper; BEP moves left
Selling price decreases	Contribution falls → BEP rises	Revenue line becomes less steep; BEP moves right

Limitations of Break-even Analysis in Operations

• Assumes all output is sold — in reality, unsold finished goods inventory means revenue does not equal price × output produced
• Assumes price is constant — operations managers may need to discount to shift excess stock or respond to competitive pressure
• Assumes variable costs are perfectly proportional — economies of scale mean variable costs per unit often fall at higher volumes; bulk purchase discounts also reduce material costs
• Static model — the chart reflects one moment in time and cannot capture the dynamic changes in a real production environment
• Single product assumption — multi-product factories must allocate fixed costs across product lines, making a simple break-even chart inaccurate

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Production Planning

Production planning ensures that the right quantities of the right products are available at the right time, while minimising costs. Two core planning tools are stock control and Gantt charts.

Stock Control

Stock (inventory) is any material or goods held by a business for future use — raw materials, partially completed goods (WIP), and finished goods. Holding stock costs money (storage, insurance, obsolescence risk), but holding too little stock risks production stoppages or lost sales.

Key Stock Control Concepts

Formula for reorder level (given constant usage rate):

$\text{Reorder level} = \text{Safety stock} + (\text{Daily usage} \times \text{Lead time in days})$

The Stock Control Chart

A stock control chart (also called a stock profile diagram) is a graph showing how stock levels change over time:

• X-axis: time (days, weeks, months)
• Y-axis: stock level (units)
• The stock level falls in a straight downward slope as stock is consumed at a constant rate
• When stock reaches the reorder level, a new order is placed
• After the lead time passes, the delivery arrives and stock jumps back up by the reorder quantity
• This creates the characteristic sawtooth pattern

Key lines on the chart:

• Maximum stock level (horizontal dashed line at top)
• Minimum/safety stock level (horizontal dashed line at bottom)
• Reorder level (horizontal dashed line in the middle)
• Stock profile (the diagonal sawtooth line)

Economic Order Quantity (EOQ)

The Economic Order Quantity (EOQ) is the optimal order size that minimises the total cost of stock management — the combination of holding costs (storage, insurance, deterioration — higher for larger order quantities) and ordering costs (administrative, delivery costs per order — higher for more frequent, smaller orders).

$\text{EOQ} = \sqrt{\frac{2 \times \text{Annual demand} \times \text{Ordering cost per order}}{\text{Holding cost per unit per year}}}$

(Note: IB SL students are not required to calculate EOQ using this formula but should understand the trade-off it resolves.)

As order size increases: holding costs rise (more stock held on average) but ordering costs fall (fewer orders placed per year). The EOQ is the order size at the intersection — the minimum total cost point.

JIT Stock Control vs Buffer Stock

A fundamental operations debate for IB essays:

	Buffer Stock Approach	JIT Approach
Safety stock held	Yes — deliberately maintained above zero	No — target is zero buffer stock
Storage costs	High	Very low
Cash tied up in stock	High	Very low
Supply chain disruption risk	Low — buffer absorbs disruptions	Very high — any disruption stops production
Supplier relationships	Less critical	Critical — suppliers must be reliable and closely integrated
Demand flexibility	Higher — buffer allows quick response	Lower — must forecast demand precisely
Best for	Unpredictable demand; unreliable supply chain	Stable demand; highly reliable, integrated supply chain

Gantt Charts

A Gantt chart is a horizontal bar chart used to plan and schedule complex projects or production processes. Each task is shown as a bar spanning its planned start date to its planned end date.

Features of a Gantt chart:

• X-axis: time (days, weeks, or months)
• Y-axis: tasks or activities in the project
• Each horizontal bar represents one task; the length of the bar shows the task duration
• Tasks that can be performed simultaneously are shown overlapping on the chart
• Dependencies can be shown — some tasks cannot start until another is complete

Advantages:

• Visual, easy to understand at a glance — managers can immediately see project status
• Easy to update as tasks are completed or delayed
• Facilitates resource planning — shows when labour, machinery, and materials are needed simultaneously
• Useful for communicating the project plan to all stakeholders

Disadvantages:

• Does not show task interdependencies or complexity in detail (unlike a Critical Path Analysis network diagram)
• Can become very complex for large projects with hundreds of tasks
• Must be continuously updated to remain useful — static charts quickly become inaccurate

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May 2026 Exam Predictions

Based on recent IB marking schemes and examiner reports, the following topics carry the highest probability of appearing in the May 2026 examination:

Paper 1 (Data response — SL and HL):

• Production method selection with justification for a described business (job vs batch vs flow)
• Break-even calculation from given data: BEP, margin of safety, and profit — full working required
• Quality management distinction: QC vs QA with recommendation
• JIT advantages and disadvantages evaluated for a given business

Paper 2 (Extended response — SL):

• Evaluate the decision to offshore or outsource production, weighing cost savings against quality and reputational risks
• Discuss whether JIT is appropriate for a business facing volatile demand (evaluate supply chain reliability, cost savings, and demand uncertainty)
• Discuss the importance of location for a new business — quantitative and qualitative factors with weighted scoring model
• Compare two production methods for a business context and recommend one

High-yield calculation topics:

• Break-even: BEP, margin of safety (units and percentage), profit calculation — appears on virtually every exam
• Stock control chart reading: identify safety stock, reorder level, lead time from a given chart
• Weighted scoring model: calculate weighted scores and recommend a location

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Practice Questions

The following questions cover all sections of Unit 5. Attempt each before revealing the model answer.

Question 1 — Production Methods: Recommend the most appropriate method (concept + justification)

Question: Sophia runs a bakery producing three products: custom celebration cakes (unique designs for individual customers), standard white bread loaves (sold daily to local supermarkets at high volume), and seasonal hot cross buns (produced in large quantities once per year before Easter). Identify the most appropriate production method for each product and justify your answer.

Model Answer:

Custom celebration cakes — Job production. Each cake is made to a unique customer specification (design, flavour, size). This requires flexible, skilled labour and individual attention from start to finish. High unit cost is justified by the premium price the customer is willing to pay for a bespoke product. Flow production would be impossible (too little volume and too much variation); batch production would not allow sufficient customisation.

Standard white bread loaves — Flow (mass) production. High volume of identical, standardised products sold daily. Flow production minimises unit costs through continuous production and economies of scale, which is essential when competing in a low-margin commodity bread market. The standardised product means inflexibility of the production line is not a disadvantage.

Seasonal hot cross buns — Batch production. Produced once per year in a large but finite quantity. Batch production allows the bakery to dedicate the production capacity to a large run of one product before switching back to other uses. The volume is too large for job production and the annual seasonal cycle does not justify the capital investment of a dedicated flow line.

Question 2 — Break-even: Full calculation with margin of safety (calculation)

Question: A business makes reusable water bottles. Fixed costs are $45,000 per month. Variable cost per bottle is $5. Selling price per bottle is $17. Current monthly output is 5,000 bottles.

Calculate: (a) the contribution per unit; (b) the break-even output; (c) the margin of safety in units and as a percentage; (d) the monthly profit at current output.

Model Answer:

(a) Contribution per unit:

$\text{Contribution} = \$17 - \$5 = \$12 \text{ per bottle}$

(b) Break-even output:

$\text{BEP} = \frac{45{,}000}{12} = 3{,}750 \text{ bottles per month}$

(c) Margin of Safety:

$\text{MoS (units)} = 5{,}000 - 3{,}750 = 1{,}250 \text{ bottles}$

$\text{MoS\%} = \frac{1{,}250}{5{,}000} \times 100 = 25\%$

(d) Monthly profit:

$\text{Profit} = 1{,}250 \times \$12 = \$15{,}000$

Verification: Revenue = $17 × 5,000 = $85,000. Total costs = $45,000 + ($5 × 5,000) = $70,000. Profit = $85,000 − $70,000 = $15,000. ✓

Question 3 — JIT vs Buffer Stock: Essay evaluation (evaluation)

Question: To what extent is Just-in-Time stock management appropriate for a large electronics manufacturer? (10 marks)

Model Answer:

Introduction: JIT is a stock management approach in which components are ordered and delivered only when needed, with the aim of holding zero buffer stock. For a large electronics manufacturer, the answer depends critically on the reliability of its supply chain and the stability of its demand.

Arguments FOR JIT:

• Electronics components are expensive and occupy significant storage space — JIT reduces warehouse costs and releases working capital
• Many electronics components (e.g., semiconductors) risk rapid obsolescence — reducing stock minimises the risk of holding components made redundant by a new chip generation
• JIT identifies quality issues immediately — a defective component cannot be buried in a warehouse; it is discovered when needed, which incentivises suppliers to maintain quality

Arguments AGAINST JIT:

• Electronics manufacturing relies on highly complex global supply chains spanning multiple countries. Any disruption — natural disaster, geopolitical tension, pandemic — immediately halts production. The 2020–2022 semiconductor shortage forced multiple automotive and electronics manufacturers to halt production lines precisely because JIT left them with no buffer.
• Demand for electronics is often volatile and difficult to forecast — new product launches, viral social media exposure, or competitor releases can create sudden demand surges that JIT systems cannot accommodate
• Building the close supplier relationships and real-time IT systems required for JIT is costly to establish and maintain

Evaluation: JIT is highly effective for manufacturers with stable demand, short and reliable supply chains, and high component costs — conditions that may partially apply to a large electronics firm with established, audited suppliers. However, the COVID-19 semiconductor crisis demonstrated that zero buffer stock creates existential vulnerability. A balanced approach — JIT for stable, low-risk components, combined with strategic buffer stock for critical or long-lead-time components — is likely more appropriate than pure JIT for a large electronics manufacturer.

Question 4 — Location: Weighted Scoring Model (calculation + evaluation)

Question: A clothing manufacturer is choosing between two factory locations: Location P and Location Q. Using the weighted scoring data below, identify the preferred location. Then evaluate the reliability of this recommendation.

Factor	Weight	Location P Score	Location Q Score
Labour cost	35	5	8
Proximity to suppliers	25	8	6
Rent/property cost	20	6	7
Infrastructure quality	15	7	5
Government incentives	5	4	6

Model Answer:

Calculation:

Factor	Weight	P Score	P Weighted	Q Score	Q Weighted
Labour cost	35	5	175	8	280
Proximity to suppliers	25	8	200	6	150
Rent/property cost	20	6	120	7	140
Infrastructure quality	15	7	105	5	75
Government incentives	5	4	20	6	30
Total	100		620		675

Recommendation: Location Q (675) scores higher than Location P (620). On a weighted-scoring basis, Location Q is preferred, primarily due to its significantly lower labour costs (the highest-weighted factor at 35).

Evaluation: The result is sensitive to the weight assigned to labour costs. Labour at weight 35 is dominant — if the clothing manufacturer’s business model shifts toward automation (reducing the importance of labour cost), or if proximity to suppliers becomes more critical (e.g., fast-fashion model requiring rapid design-to-shelf turnaround), Location P might score higher. The scores are also subjectively assigned — the model should be used as a structured starting point, not as a definitive answer. Qualitative factors such as political stability, cultural environment, and quality of life for management should also be considered.

Question 5 — Quality Management: QC vs QA recommendation (concept + evaluation)

Question: A pharmaceutical company produces prescription tablets. Evaluate whether Quality Control or Quality Assurance is more appropriate for this business.

Model Answer:

Quality Control involves inspecting finished products after production to detect defects. In pharmaceuticals, this would mean testing samples from each batch of tablets after manufacture to check for correct dosage, contamination, or packaging defects.

Quality Assurance involves building systems and processes throughout production to prevent defects from occurring in the first place — documented procedures, controlled environments, employee training, and certification (e.g., ISO 9001 or pharmaceutical GMP — Good Manufacturing Practice).

Case for QA being more appropriate:

For a pharmaceutical company, QA is strongly preferred for three reasons:

1. Safety risk: A defective tablet that passes through inspection (sampling only detects some defects, not all) could harm or kill a patient. QA prevents defects from occurring, which is critical when the consequence of failure is loss of life.

2. Regulatory requirement: Pharmaceutical manufacturing is subject to Good Manufacturing Practice (GMP) regulations in virtually every country — regulators require documented QA systems as a legal condition of production. QC alone is insufficient for regulatory compliance.

3. Cost efficiency: Producing tablets that fail quality standards wastes all the ingredients, manufacturing time, and energy used. QA prevents this waste by catching process deviations before they produce defective output.

Acknowledgement of QC’s role: QC final inspection still has a role as a last line of defence — IB students should recognise that QA and QC are complementary rather than mutually exclusive in high-stakes industries.

Conclusion: For a pharmaceutical business where defects can be life-threatening and where regulatory compliance requires documented QA systems, Quality Assurance is clearly more appropriate than Quality Control as the primary quality management approach.

Question 6 — Break-even Chart: Effect of cost change (concept)

Question: A business is currently operating with fixed costs of $40,000, a variable cost of $6 per unit, and a selling price of $14 per unit. The business’s landlord increases rent by $10,000 per year. Explain the effect of this rent increase on the break-even chart and the break-even output.

Model Answer:

The rent increase is a fixed cost increase of $10,000, raising total fixed costs from $40,000 to $50,000.

Original break-even output:

Contribution per unit = $14 − $6 = $8

BEP (original) = $40,000 ÷ $8 = 5,000 units

New break-even output:

BEP (new) = $50,000 ÷ $8 = 6,250 units

Effect on the break-even chart:

1. The fixed cost line shifts upward by $10,000 — it is now a horizontal line at $50,000 instead of $40,000
2. The total cost line also shifts upward by $10,000 at every output level (since TC = FC + VC, and FC has increased)
3. The revenue line is unchanged — selling price has not changed
4. The intersection of the TC line and the revenue line (the break-even point) shifts to the right — the BEP increases from 5,000 to 6,250 units
5. The margin of safety decreases for any given level of current output

The business must now sell an additional 1,250 units per month just to break even — it has less safety margin before losses occur.

Question 7 — Stock Control: Reading the chart (concept)

Question: A business has the following stock control data: maximum stock level = 800 units; safety stock = 100 units; reorder quantity = 600 units; lead time = 5 days; daily usage = 20 units. Calculate: (a) the reorder level; (b) how many days the stock lasts from maximum level to reorder level; (c) total cycle time (days between deliveries).

Model Answer:

(a) Reorder level:

$\text{Reorder level} = \text{Safety stock} + (\text{Daily usage} \times \text{Lead time})$

$= 100 + (20 \times 5) = 100 + 100 = 200 \text{ units}$

(b) Days from maximum stock to reorder level:

Stock falls from 800 units to 200 units = 600 units consumed at 20 units per day:

$\text{Days} = \frac{600}{20} = 30 \text{ days}$

(c) Total cycle time:

Time from reorder level to delivery = lead time = 5 days. After delivery, stock rises from 200 units back to maximum (200 + 600 = 800). Total cycle time = days from maximum to reorder level + lead time = 30 + 5 = 35 days between deliveries.

Question 8 — Operations Strategy: Evaluate outsourcing (evaluation)

Question: A UK software company is considering outsourcing its customer support function to a call centre in the Philippines. Evaluate this decision.

Model Answer:

Advantages of outsourcing to the Philippines:

• Lower labour costs: wage rates in the Philippines are significantly lower than in the UK. Customer support agents can be hired at a fraction of the UK cost, substantially reducing the operating cost of the function.
• Specialist expertise: established Philippine call centres have developed expertise in customer service delivery for international technology companies. They can provide a professional service with trained staff.
• Scalability: the software company can scale customer support up or down by adjusting the outsourcing contract without the HR and legal complexity of hiring and firing UK employees directly.
• Focus on core competence: management can concentrate on software development (the company’s core skill) rather than managing a customer support operation.

Disadvantages:

• Quality control risk: the company loses direct control over how its customers are treated. Poor service reflects on the software brand, not the call centre brand. Cultural differences and accents may create frustration for some UK customers.
• Communication and time zone challenges: 8-hour time difference means real-time collaboration with the Philippine team requires late UK evenings or early Philippine mornings. Escalating complex technical issues is harder at distance.
• Reputational risk: customers may react negatively to calls being handled overseas — some view this as a reduction in service quality or as job losses to UK employees.
• Dependence and switching costs: once the outsourcing relationship is established and in-house capability is lost, switching providers or bringing the function back in-house is costly and disruptive.

Evaluation: The decision is financially attractive — if labour cost savings are significant and the outsourced provider can maintain acceptable service quality, outsourcing makes sense. However, customer support is often the primary touchpoint through which customers form opinions about the software company’s brand. For a software business where customer retention and reputation are critical competitive factors, the quality control risk deserves serious weight. A pilot programme — outsourcing support for one product line while retaining in-house support for premium customers — would allow the company to test the quality trade-off before committing fully.