The reorder point is the stock level at which a new order should be placed with the supplier to avoid running out. It covers usage during the delivery lead time plus safety stock.
The reorder point (also called the order point or replenishment level) is an inventory management metric that indicates the stock level of a product at which a new order should be placed with the supplier, to make sure stock doesn't run out before the delivery arrives. It is the threshold that triggers a purchase, turning inventory management from reactive ("we're running out, we need to order") into proactive and systematic ("we've hit the reorder point, time to order"). The reorder point is calculated by adding two components: expected usage during the lead time (how long the supplier takes to deliver from the moment the order is placed) plus safety stock (a margin to absorb swings in demand or supplier delays). This formula ensures that, even in the worst reasonable scenario (above-average demand AND a supplier taking longer than usual), the restaurant doesn't run out of product.
The difference between the reorder point and par stock is subtle but important: par stock is the optimal stock level you want to have (the "ceiling"), while the reorder point is the level that triggers the order (the "floor"). When stock falls to the reorder point, you order the quantity needed to get back to par. The two concepts work together in an efficient inventory management system. In restaurants, where many products have short lead times (24–48 hours for local suppliers) and demand varies by day of the week, the reorder point should be calculated with these particularities in mind.
A product ordered daily will have a reorder point very close to one day's usage plus safety stock; a product ordered weekly will need a reorder point that covers the whole week's usage plus the margin. Setting a reorder point for every product removes improvisation from purchasing, reduces both stock-outs (from ordering too late) and excess stock (from ordering "just in case"), and lets you delegate purchasing to any team member with one simple rule: "if the product is at or below this level, order".
Reorder point = (Average daily usage × Lead time in days) + Safety stock
The reorder point formula combines two elements: first, expected usage during the time the supplier takes to deliver (daily usage × lead time), which is the minimum quantity needed so you don't run out while the order is on its way; second, safety stock, which adds a margin for swings in demand or delays. For example, if you use 4 kg of salmon a day, your supplier takes 2 days to deliver and your safety stock is 3 kg (to cover a busy day), the reorder point is (4 × 2) + 3 = 11 kg. When your salmon stock drops to 11 kg, you should place an order. If you wait until you have less, you risk running out of salmon if demand rises or the supplier is late.
For products whose usage varies by day of the week, the calculation can be refined: if the order is placed on Monday for delivery on Wednesday, you should consider Tuesday's and Wednesday's usage (the delivery days) plus safety stock, not overall average usage. Some restaurants calculate dynamic reorder points that vary by day of the week: Thursday's reorder point (ordering for the weekend) is higher than Monday's (ordering for quieter days).
You manage the stock of a restaurant with 180 product lines and want to introduce a reorder point system. You look at your three main suppliers: the meat supplier delivers within 24 hours (1-day lead time), the fish supplier within 48 hours (2-day lead time), and the dry goods supplier within 3–5 days (average lead time 4 days). You calculate the reorder point for three representative products: Beef sirloin: average usage 3.5 kg a day, 1-day lead time, 2 kg safety stock (to cover weekend peaks). Reorder point = (3.5 × 1) + 2 = 5.5 kg.
Fresh sea bass: average usage 2.8 kg a day, 2-day lead time, 2 kg safety stock (the supplier occasionally lets you down). Reorder point = (2.8 × 2) + 2 = 7.6 kg, rounded up to 8 kg. Extra virgin olive oil: average usage 1.2 litres a day, 4-day lead time, 3 litres safety stock (a critical product). Reorder point = (1.2 × 4) + 3 = 7.8 litres, rounded up to 8 litres.
You set these points in your system: every morning, the head chef checks the critical products (category A in the ABC analysis) against their reorder points. If the sirloin is at 5 kg (below 5.5 kg), they place an order. If it is at 7 kg, there's no need. This simple system removes improvised decisions and ensures there is always product without building up excess.
The reorder point matters because it turns purchasing from an art based on intuition ("I think we're running low on this") into a systematic, repeatable process. Without defined reorder points, each person who places orders uses their own judgement: one orders when the cold room looks "empty" (perhaps already too late), another orders "to be safe" even with plenty in stock (creating excess and tying up cash). With reorder points, anyone on the team can handle purchasing correctly by following a simple rule: if stock is at or below the point, order; if not, don't. This standardisation is especially valuable in restaurants with high staff turnover or where the person in charge of purchasing isn't always available.
The reorder point is also the foundation for order automation: modern inventory management systems can automatically generate suggested orders when theoretical stock (updated with every sale) reaches the reorder point, drastically reducing the time spent checking stock and placing orders by hand. The reorder point also optimises working capital: it ensures you have enough stock to operate without interruption, but no more than you need. Every extra euro tied up in stock above what the reorder point + par stock system calls for is money that could be generating value elsewhere in the business. Finally, analysing reorder points over time reveals valuable information: if you often hit the reorder point and still run out before the delivery arrives, your safety stock is too low or your lead time is wrongly estimated; if you almost never hit the reorder point, you may be ordering too often or carrying excess stock.
Zindra automatically calculates the optimal reorder point for each product based on its usage history, its supplier's lead time and the configured safety stock. The system alerts you when stock reaches the reorder point, generates automatic suggested orders and adjusts the calculations when it detects changes in usage patterns or supplier delivery times.
Tools and content to go deeper into this concept.
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Safety stock is the minimum quantity of each product that should always be kept in storage to absorb unexpected swings in demand or supplier delays, avoiding stock-outs.
Par stock (or par level) is the optimal quantity of each product to have in storage at the start of each period, calculated to cover expected demand plus a safety margin without building up excess.
Days of inventory (DSI, or Days Sales of Inventory) measures how many days of usage your current stock covers. A DSI of 5 means you have enough stock for 5 days of normal trading.
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