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E1: 31: P48013 Work Order Start Dates & Back Scheduling Calculations (Doc ID 626117.1)

Last updated on DECEMBER 22, 2023

Applies to:

JD Edwards EnterpriseOne Product Data Management - Version XE and later
JD Edwards EnterpriseOne Requirements Planning - Version XE and later
JD Edwards EnterpriseOne Shop Floor Control - Version XE and later
Information in this document applies to any platform.
P48013 - Manufacturing Work Order Processing, R3007G - Work Center Resource Units Generation, P00071 - Workday Calendar, P3006 - Work Center Revision, P3007 - Work Center Resource Units
P3009 - Manufacturing Constants, P3002 - Bill of Material Revisions, P3003 - Work With Routing Master, P3112 - Work Order Routing, R30822A - Leadtime Rollup, R31410 - Order Processing



EnterpriseOne Shop Floor Management back scheduling routine ensures that the materials processed to a certain operation step are out of production and available to meet the required date for completing a (work) order.

Assigning the Start and Requested dates for each operation is referred to as back scheduling

Determining the Work Order Start Date and the Start Date of the First Operation Step on the routing there are 2 separate operations that take into consideration different details / factors and cannot be performed in the same time.  The dates of the routing instructions can only be determined if the Work Order Start Date has been determined and the Work Order Header Start Date is calculated based on the Requested date of the Order.

The use of a Fixed Leadtime versus a Variable Leadtime can depend on whether there are consistent work order quantities for a manufactured item.  A significant variation is any amount that requires more or less lead time. In case the work order quantities vary significantly, the use of variable lead time is advisable.


Fixed Leadtime remains the same, regardless of the quantity produced, while Variable Leadtime adjusts according to the quantity produced.

Work order routing start date will not consider work order start date when user manually changes the work order start date in work order header program and/or when user changes the fixed level lead time for an item in item branch plant. In both scenarios work order routing start date is back scheduled based on the fixed level lead time and work order requested date.

This bulletin is a supplement to existing documentation and its purpose is to explain the details of Fixed Leadtime back scheduling.  Included are the calculations for the Work Order header Start Date (P48013) and Routing Operations (P3112) as performed in EnterpriseOne.


This article will cover the WO Start Date and back scheduling calculations for only Fixed Lead time items.  If interested in using Variable Leadtime, refer to E1: 31: Variable Lead Time Work Order Start Dates & Back Scheduling Calculations Document 881632.1


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In this Document
 Processing Options
 Work Order Header (P48013) Start Date Calculation
 Work Order Start Date with Fixed Leadtime Item
 WO Start Date Calculation Examples
 Example for 'QueueMove Flag = 0' and WRHD greater than Work Hours per day at the work center level
 Example for 'QueueMove Flag = 1' and WRHD greater than Work Hours per day at the work center level
 Example for 'QueueMove Flag = 0' and WRHD smaller than Work Hours per day at the work center level
 Example for 'QueueMove Flag = 1' and WRHD smaller than Work Hours per day at the work center level
 Routing Operations (P3112) Back Scheduling Calculations
 Fixed Leadtime Back Scheduling Calculation
 Example for back scheduling Routing Instructions for Fixed Leadtime item
 Particular Scenarios
 Back scheduling overlapping / concurrent operation steps:
 Planned Effective Date
 Troubleshooting Tips
 Tip 1.  The start and end date are the same for all routing steps
 Tip 2.  The operation(s) start and end dates are prior to the work order header start date
 Tip 3.  Different results for Start and End Dates on the routing operations when attaching the routing interactively via 'Copy by Item' option versus UBE R31410
 Tip 4.  The WO Start Date change on the WO Header (P48013) does not trigger the expected change of the Routing Start Date (P3112)
 Tip 5.  The Start and Request Dates of several WO routing steps changed after adding a new operation sequence onto a Work Order Routing (P3112)
 Related Knowledge Content

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