APO PPDS - ext.procurement - planning with safety days of supply and pl calendar

[Former Member]

External procurement with safety days of supply and planning calendar and SAP_PP_002 heurstic.

• 1.We have a planning calendar (time stream) defined as follows:
• -header data:
• calculation: period calendar (without gaps)
• calendar – assigned working with 5 days per week incl. bank holidays, etc.
• - calculation rule: one week with periods begin on the following weekdays:
• 1. Monday
• 2. Tuesday
• 4. Thursday
• The tab periods “shows the correct periods” considering the allocated factory calendar with 5 working days per week and bank holidays, etc.
• 2.We use periodic lot size with planning calendar and safety days of supply as follows in the product master data:
• Tab lot size:procedure:
• - periodic, period type: K ; nr. of periods: 1
• - planning calendar as above described
• - last lot exact is flagged.
• Qty and date determination:
• - min lot size 48
• - rounding value 48
• Safety Days’ Supply: 2
• Use period factor is flagged and the factor is “0” = the created schedule lines are to be placed at the beginning of the period.
• Safety Stock Method: “SZ” = Safety Days' Supply from Location Product Master
• 3.We run the heuristic SAP_PP_002 with following settings:

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• Lot-size is not flagged in the heuristic settings.
• When we run these heuristic we see that the safety days of supply of 2 day are not considered.
• Example: Requirement date is 12.9.18 (Wednesday) but the receipt date is 11.9.18. According to the 2 days of the safety days of supply and the planning calendar (without gaps) below on the right, the receipt date should be 10.9. - Monday (12-2=10).

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• none of the SL is fixed. I ask myself why the SL with end nr 36 has been scheduled with receipt date on the 11.9. to cover requirements on the 12.9.? Is it because the last requirement covered by this SL “36” is on the 14.9.?14.9.-2 days of supply is 12.9. = planning calendar period 11-12.9. due to period factor used “0” the schedule line has to be scheduled at the beginning of the period = 11.9. 00. This I could understand that way..but is my way of thinking correct?
• My assumption when working with safety days of supply in APO PPDS is that the receipt element will be created before the requirement date in as many days as the safety days of supply is defined and according to the planning calendar…Having said that and considering here a periodic lot size = "1 period" the results of the heuristic should be:
• At the beginning of each period a schedule line should be created that covers the demand of that period.
• Due to the safety days of supply of 2 days the schedule line should be scheduled 2 days before the requirement date in PPDS. If the new date is not in the beginning within the (calendar) period, the SL will be “moved” to the beginning of that period due to period factor “0”.
• Any hints or thoughts?
• Kr,
• Pilvi