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3 articles
For seasonal and promotional goods the hard part is rhythm, not formulas: build-up, peak and clearance phases each have different objective functions. Seasonal indices, uplift estimation, phased replenishment and clearance tactics.
Stockouts and overstock are two faces of the same coin. Five recurring pitfalls in replenishment models — uniform parameters, the average trap, promotion contamination, one-sided KPIs and stale parameters — and how to correct each.
The statistics behind safety stock: the classic formula, z-scores per service level, the combined demand-and-lead-time variability formula, plus a worked example and code.
