The importance of managing stock levels

Effective stock management involves balancing the amount of materials or goods a business holds. Holding too much stock ties up money in storage and increases costs, while holding too little can lead to shortages that disrupt production or sales.

Key considerations in stock management

• High stock levels - These result in higher storage costs, such as rent for warehouse space and wages for staff to manage the stock.
• Low stock levels - These risk running out of materials, which can halt production or prevent meeting customer orders on time.
• Overall goals - Businesses aim to minimise costs while ensuring they have enough stock to operate smoothly and respond to demand.

How just-in-time (JIT) stock control works

Just-in-time (JIT) is a stock management approach that minimises the amount of stock held by a business. It focuses on receiving materials exactly when they are needed for production, reducing the need for large inventories.

Key features of JIT

• Minimal stock holding - Stock levels are kept as low as possible, ideally close to zero, with materials arriving just before they are used.
• Production process - Raw materials enter the business, are quickly turned into finished products, and are shipped out immediately to customers.
• Role of technology - Computer systems track stock levels in real-time and automatically place orders with suppliers when supplies run low.
• Supplier coordination - Businesses rely on frequent, small deliveries from reliable suppliers to maintain the flow of materials without interruptions.

Advantages and disadvantages of JIT

JIT can offer significant benefits by streamlining operations, but it also comes with challenges related to supply chain reliability.

Advantages of JIT

• Cost savings - Reduces expenses on warehouse space and staff needed for storage.
• Reduced waste - Lowers the chance of stock becoming outdated or damaged over time.
• Improved cash flow - Shortens the time between purchasing materials and selling products, freeing up cash for other uses.

Disadvantages of JIT

• Dependency on suppliers - Requires close coordination; delays or errors in deliveries can cause production stoppages.
• Frequent small orders - Businesses miss out on bulk-buying discounts and economies of scale from purchasing large quantities.
• Vulnerability to disruptions - Any issues, such as transport problems or supplier shortages, can quickly lead to stockouts.

The role of buffer stocks in production

Buffer stocks are extra quantities of materials kept at various stages of production to act as a safety net. They help businesses cope with unexpected issues, though they come with drawbacks.

Benefits of buffer stocks

• Provide protection against sudden supply shortages or spikes in customer demand.
• Ensure continuous production by covering gaps if deliveries are late.

Drawbacks of buffer stocks

• Increase storage costs, as extra space and management are required.
• Tie up capital that could be used elsewhere in the business.

Many businesses use computer systems to monitor buffer stocks and automatically reorder when levels drop too low.

Using bar gate stock graphs to monitor stock

Bar gate stock graphs are visual tools that help businesses track stock levels over time and decide when to reorder materials. They resemble a bar gate in shape and show key stock management points.

Key elements of bar gate stock graphs

• Maximum stock level - The highest amount of stock a business aims to hold, to avoid excessive storage costs.
• Reorder level - The point at which stock has fallen low enough to trigger a new order, ensuring supplies arrive before running out.
• Buffer stock (minimum level) - The lowest safe stock level, acting as a cushion against delays or increased demand.
• Order quantity - Shown by the height of vertical lines on the graph, representing how much is ordered each time.
• Lead time - The time between placing an order (at the reorder level) and the stock arriving, indicated by the horizontal distance on the graph.

These graphs allow businesses to visualise stock fluctuations and plan orders effectively, often supported by computer monitoring.