Free calculators and plain-English guides to help you forecast demand, size safety stock, and plan purchases — whether or not you use Fopsis.
Work out the right buffer for any product from your service level, lead time, and demand variability — in seconds, no sign-up required.
Moving averages, exponential smoothing, Holt-Winters and more — what each method is good at, and how Fopsis auto-picks the best one for each product.
Why a service level of 95% isn't the same as never stocking out, and how to set buffers that protect sales without tying up cash.
If a product sold out, your history understates demand — and naive tools then under-order it forever. How lost-sales correction breaks the loop.
Returned units aren't demand. How netting returns keeps your forecast — and your purchase orders — honest.
Seed a launch from comparable products, category seasonality, and a launch ramp — instead of guessing or waiting for data.
When you can't buy everything, buy the right things. How open-to-buy prioritizes spend by urgency and margin.
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