Managing inventory using bar gate stock graphs and reorder levels, just-in-time versus just-in-case, the management and choice of suppliers, and the use of outsourcing in the supply chain.

What this dot point is asking

AQA wants you to explain inventory management using bar gate stock graphs and reorder levels, compare just-in-time with just-in-case, explain how firms manage and choose suppliers, and assess the use of outsourcing. You may be asked to interpret a stock graph.

Managing inventory with stock graphs

The graph lets a firm read off how much it holds, how fast it uses stock, the lead time between ordering and delivery, and whether it ever risks running out. Holding too much stock ties up cash and risks waste; holding too little risks running out and halting production.

Just-in-time versus just-in-case

Choosing and managing suppliers

A firm chooses suppliers on more than price. Key factors are quality (consistent, to specification), reliability (right quantity, on time), flexibility (able to scale up or change at short notice), capacity (large enough to meet the firm's needs), cost, and increasingly ethics and sustainability. Good supplier management builds long-term relationships that secure supply, quality and sometimes better terms, which protects the firm's own delivery and quality promises to customers.

Outsourcing

Outsourcing is contracting an activity (such as logistics, IT or component manufacture) to an external specialist rather than doing it in-house. It can cut costs, give access to expertise and let the firm focus on its core strengths, but it reduces direct control over quality and timing and creates dependence on the provider, so it must be managed carefully.

Inventory control as a balancing act

The thread running through this dot point is balance. Holding stock costs money: it ties up cash that could be used elsewhere, needs warehouse space, must be insured and handled, and can spoil, be stolen or become obsolete. Holding too little, though, risks running out (a stock-out), which halts production, loses sales and damages the firm's reputation for dependability. Inventory management is the art of holding just enough, which is why the reorder level, buffer stock and lead time all matter so much, and why the choice between just-in-time and just-in-case is so consequential.

That balance connects directly to the wider operational objectives. A firm prioritising low cost leans toward just-in-time and minimal stock to free up cash; a firm prioritising dependability holds more buffer stock as insurance. The right choice depends on how reliable the supply chain is, how predictable demand is, and how costly a stock-out would be. A supermarket running fresh produce on tight just-in-time delivery accepts the supply risk because holding excess perishable stock would be ruinous; a hospital holding critical supplies just-in-case accepts the holding cost because a stock-out is unacceptable. Matching the inventory strategy to these circumstances, rather than applying one model everywhere, is the mark of strong supply-chain management.