1. Using Supply Planning
  2. Example of How to Offset Dependent Demand Due Dates in Aggregate Time Buckets

Example of How to Offset Dependent Demand Due Dates in Aggregate Time Buckets

Let's look at an example of how you can offset dependent demand due dates when you plan in aggregate time buckets.

For our example, your constrained supply plan is run in weekly buckets and the planning calendar is a 5,2 calendar (5 days working, 2 days nonworking). The demand for a finished good is on day 21.

  • The demand for a finished good (FG) is in distribution organization D1.

  • The finished good is sourced from manufacturing organization M1 and is manufactured in M1.

  • The in transit lead time between organization D1 and M1 is 3 days.

  • The finished good and subassembly (SA) are make items and the raw material is a purchased item.

  • The processing lead time for each item is 4 days and there are no other lead times.

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You can set the item attribute for aggregate time buckets to offset the dates. For our example, let's set the Lead Time Offset in Week Buckets attribute for the finished good and subassembly to 7 in the M1 organization.

The constrained supply planning process looks at the Lead Time Offset in Week Buckets attribute value. If the value is greater than the processing lead time for the item, the planning process replaces the processing lead time with the Lead Time Offset in Week Buckets attribute value. In our example, processing lead time is 4 days, which is less than a week. So, the planning process picks up the value in the Lead Time Offset in Week Buckets attribute, which is 7.

For the finished good in the M1 organization, the due date and dock date falls on week 3 (postprocessing led time is 0 in our example). However, the start date is offset by one week and falls on week 2 (dock date minus Lead Time Offset in Week Buckets attribute value). Since it's a weekly bucket, the start date is bucketed to the end of week 2.

Similarly, for the subassembly (SA), the dock date and due date is on the end of week 2, but the start date is bucketed on week 1.

For the raw material (RM), the Lead Time Offset in Week Buckets attribute value is blank. The planning process considers the processing lead time and buckets all dates (start date, ship date, dock date, and due date) on the end of week 1.

The planning process considered the Lead Time Offset in Week Buckets item attribute in this example because of planning in week buckets. If the item is planned in period or month buckets, then the planning process considers the Lead Time Offset in Period or Month Buckets attribute.