Effective Days Calculations

Effective days are the number of days (including weekends) that you estimate before a lot will be available for commitments to sales or work orders when the lot is placed in on-hand inventory. For the system to calculate a future effective date to a lot, you must define the number of days before the lot becomes effective. You can override the system-calculated effective date as necessary.

When calculating effective days, the system assigns to all lots an effective date that is equal to the lot on-hand date, plus the number of days that is defined in the Manufacturing Effective Days or Purchasing Effective Days fields. If you create a lot using a purchase order receipt, the effective date equals the purchase order receipt date, plus the number of days that is specified in the Purchasing Effective Days field. If the lot is created through a work order completion, the effective date equals the work order completion date plus the number of days that is specified in the Manufacturing Effective Days field.

You assign and maintain default values for the manufacturing and purchasing effective days in both the Item Master (P4101) and Item Branch (P41026) programs. When you specify this value in the Item Master, the system updates the value in the item branch. However, when calculating the effective date for a lot, the system retrieves effective days values only from the item branch/plant record.