How do businesses manage stock and cut waste?
Stock (inventory) management including buffer stock, lead time, re-order levels and the interpretation of stock control charts, just-in-time and just-in-case approaches, lean production and Kaizen, and the management of supply chains.
A focused answer to the OCR A-Level Business operations theme on stock and lean, covering buffer stock, lead time and re-order levels, stock control charts, just-in-time versus just-in-case, lean production and Kaizen, and the management of supply chains.
Reviewed by: AI editorial process; not yet individually human-reviewed
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What this theme is asking
OCR wants you to manage stock (including reading a stock control chart), to compare just-in-time and just-in-case approaches, and to explain lean production and supply-chain management. Interpreting a stock control chart is a quantitative skill that appears in Component 1.
Stock control
Holding stock costs money (storage, insurance, the cash tied up, the risk of obsolescence), but holding too little risks stockouts that halt production or lose sales. Stock control sets the re-order level and quantity to balance these.
Reading a stock control chart
A stock control chart plots stock level on the vertical axis against time on the horizontal axis. Stock falls as it is used, then jumps up when a delivery arrives, forming a saw-tooth pattern. The chart shows the maximum stock, the buffer stock (the floor), the re-order level, and the lead time (the gap between the re-order point and the delivery). Reading it lets a firm check whether stock ever dips below buffer (a risk of stockout) and whether deliveries arrive on time.
Just-in-time and just-in-case
Lean production and Kaizen
Lean techniques (JIT, Kaizen, cell production, total quality management) raise efficiency and lower cost, and engage staff who contribute ideas. The trade-off is that lean systems can be fragile (JIT especially) and require a culture of discipline and trust to work.
Supply-chain management
The supply chain is the network of suppliers, manufacturers and distributors that gets a product from raw material to customer. Managing it well, choosing reliable suppliers, coordinating deliveries, and building in resilience, keeps the right inputs flowing at the right cost. Global supply chains lower cost but are long and fragile, exposed to shipping delays, geopolitics and pandemics, which is why many firms now balance cost against resilience.
Examples in context
Toyota pioneered JIT and Kaizen, holding minimal stock and improving continuously, which cut cost and raised quality but left it exposed to supply shocks. Many firms learned the fragility of long global supply chains during the pandemic, when JIT systems seized up, and have since rebuilt some buffer stock. A supermarket uses sophisticated stock control to keep shelves full while minimising waste on perishable goods.
Try this
Q1. State what is meant by lead time in stock control. [2 marks]
- Cue. The time between placing an order with a supplier and receiving the delivery.
Q2. Analyse one drawback to a firm of holding high levels of stock. [6 marks]
- Cue. High stock ties up cash, raises storage and insurance costs and risks obsolescence, developed as a chain in context.
Exam-style practice questions
Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
OCR H431/01 20214 marksExplain one benefit to a manufacturer of holding buffer stock. (4)Show worked answer →
A Component 1 "Explain" rewards one developed point in context. Define buffer stock as a minimum level of stock held as a safety margin against unexpected demand or supply delays. Build the chain: if a supplier is late or demand spikes, the manufacturer can draw on buffer stock to keep producing and fulfilling orders, so it avoids halting the production line or disappointing customers. Therefore buffer stock protects continuity of production and customer service. Markers reward the link from the safety-margin role of buffer stock to the specific benefit (no stockouts, no production halt), anchored in the manufacturing context.
OCR H431/03 202316 marksEvaluate whether a global manufacturer should adopt just-in-time stock management. (16)Show worked answer →
A 16-mark evaluation on a four-level grid. For JIT: it minimises stock, so it frees up cash, cuts storage and insurance costs, reduces waste from obsolescence, and supports lean, flexible production. Chain: holding almost no stock releases working capital and lowers holding costs, improving liquidity. Against: JIT depends on totally reliable, fast suppliers, so any disruption (a delayed shipment, a port closure, a pandemic) halts production immediately, and global supply chains are especially exposed to such shocks. Evaluation: JIT suits a firm with reliable local suppliers and stable demand, but a global firm facing long, fragile supply chains may prefer some buffer stock (a hybrid). A judged conclusion, weighing the cash and waste savings against supply-chain risk, reaches the top band.
Related dot points
- Operational objectives including cost, quality, speed, dependability and flexibility, the concept of added value, and the main methods of production (job, batch, flow and cell) and the factors that determine the choice of method.
A focused answer to the OCR A-Level Business operations theme on objectives and production, covering operational objectives (cost, quality, speed, dependability, flexibility), added value, and the job, batch, flow and cell methods of production with the factors that determine the choice.
- The measurement and management of capacity utilisation, labour productivity and efficiency, the causes and consequences of under- and over-utilisation, economies and diseconomies of scale, and ways to improve productivity and efficiency.
A focused answer to the OCR A-Level Business operations theme on efficiency, covering capacity utilisation, labour productivity and unit cost, under- and over-utilisation, economies and diseconomies of scale, and ways to improve productivity, with worked calculations.
- The importance of quality, the distinction between quality control and quality assurance, total quality management and quality standards, the costs and benefits of improving quality, and the consequences of poor quality.
A focused answer to the OCR A-Level Business operations theme on quality, covering the importance of quality, the difference between quality control and quality assurance, total quality management, quality standards, and the costs and consequences of poor quality.
- The impact of technology on operations including automation and computer-aided design and manufacture, the role of research and development and innovation, the difference between product and process innovation, and the benefits and risks of investing in new technology.
A focused answer to the OCR A-Level Business operations theme on technology and innovation, covering automation and computer-aided design and manufacture, the role of research and development, the difference between product and process innovation, and the benefits and risks of investing in new technology.
- The importance of cash flow and the difference between cash and profit, the construction and interpretation of cash-flow forecasts, the causes of and solutions to cash-flow problems, and the purpose and use of budgets and variance analysis.
A focused answer to the OCR A-Level Business finance theme on cash and budgets, covering the difference between cash and profit, cash-flow forecasts, the causes of and solutions to cash-flow problems, and budgets and variance analysis, with worked calculations.
Sources & how we know this
- OCR A-Level Business (H431) specification — OCR (2015)