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Inventory & replenishment

ABC/XYZ analysis, inventory turnover and carrying cost, economic lot size, safety stock, reorder point and kanban.

EOQ and EPQ

Calculate the economic order quantity (Harris) and economic production quantity (Taft), the total cost curve, savings versus your current lot and how far setup cost must fall to run small lots.

Setup cost, holding cost, lot size

Safety stock and reorder point

Calculate safety stock and reorder point accounting for usage and supplier lead time variability, for continuous or periodic review, and check the service level with a simulation.

Service level, variability, lead time, simulation

Kanban sizing

Calculate how many kanban cards and containers should circulate, maximum and average inventory, supermarket floor area, container weight and the capital freed compared with current stock.

Cards, containers, supermarket

ABC and XYZ analysis

Paste your item list with cost and usage to classify inventory by ABC (value) and XYZ (demand regularity), see the Pareto chart and the suggested replenishment policy for each class.

Pareto, classes, policy matrix

Inventory turnover and carrying cost

Compute inventory turnover and days of supply, annual carrying cost (capital, storage, insurance, losses), slow-moving stock and the cash freed by lowering coverage, with payback.

Turns, days, capital cost