Weekly Sales, Stock & Intake (WSSI)
A WSSI (Weekly Sales, Stock & Intake) is a weekly retail plan that tracks the flow of stock through a season. Its core identity is closing stock = opening stock + intake − sales, with each week’s closing becoming the next week’s opening.
The WSSI is the standard in-season trading tool for merchandisers, especially in the UK and Europe. Read across the weeks and it shows where you will run short or pile up — early enough to adjust intake.
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RetailNorthstar puts these metrics where planning decisions happen — connected to one plan, live against actuals.
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