Trailing 365 days; release to fully usable receipt in calendar days. Six distinct completed purchasing documents, at least 75% consistently two days earlier/later, and an average change of at least two days are required. Open overdue or aging history blocks reductions. Safety stock stays unchanged. The operating target is the midpoint of the min/max inventory-position band, not a cost-optimized or guaranteed service level. Confirmed PO dates are unchanged; the stock projection covers 60 days.