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Work Orders: Work Order Operation List Maintenance


This window is opened from either the Change Route button on the Work Order Maintenance window or the Route button on the MRP Work Order Recommendations window.

Every time a Work Order is created on the system a copy of the operational Process Route is created and held against that specific Work Order. When the WO is cancelled or completed, the route is automatically deleted. Work History records the operational activity. At the time of creating the WO you can amend the standard route, that can contain alternate operations. Capacity Planning takes account of the stored WO-specific route. Shopfloor activity and Work History reflects the stored route rather than the design Process Route. When creating a WO you can even drop standard operations which have no alternates and add completely new operations specific to the particular WO. Once the WO has been created, it is independent of the design Process Route.

There are some rules and restrictions that apply:

Any change can be made to the operations of a WO before it has been saved to the database.

If the WO has not been kitted or backflushed, changes can be made to the operations.

If any outwork operation has been placed on a Purchase Order or RFQ, that operation cannot have its operation number or work centre changed while it is still subject to a PO or RFQ.

If some of the WO has been received, or Shopfloor data collected for the final operation, the final operation number cannot be removed or changed, nor can a higher operation number be added to the WO route. However, the details of the final operation, including Work Centre, can be changed.

File Path

Process > Work Orders > Select a Work Order > (Change Route button)

This file path takes you to the Work Order Operation List Maintenance window.

Graphical user interface

Description automatically generated with medium confidence

Revert to Full Route button

Select to reload the full stored process route with all alternatives.

Add Extra Operation button

Select to add an operation that is not otherwise listed in the standard route.

Operations list

A list of operations for a specific work order.

Normal In-House Operations are marked with a Normal Operation icon.
Outwork Operations are marked with a Outwork Operation icon.
Alternative Operations and those added for this WO are marked with an additional Alternate Operation icon

Operation Number

The operation number.

Work Centre Code

The relevant work centre code.

Set Hours

Operation set up time in hours.

Run Hours

The operations run time in hours.

Lag Hours

The operation lag time in hours.

Mass Change

Operation mass change on assembly.

Std. Text

Standard work text code

Work Centre Description

Description of work centre.


Operations instruction text.

Extra text

Extra information for schedule transfer.

Revert button

Click to revert to the previous saved list before any changes were made.

Apply to WO button

Click to apply this amended list to the Works Order.

Entering Time Values using HMSP Syntax

The system stores and uses times in decimal hours. 1.5000 hours rather than 1hr 30min. However, you can enter time in several different ways that will automatically convert to the equivalent decimal hours when you leave the field.



Example which Converts to


h or H

Ih30m = 1.5000


m or M

20m = 0.333


s or S

3.6s = 0.0010


: or ;

1:30 = 1.5000



1:30m36s = 1.5100

Pieces per hour

p or P

100p = 0.0100

See Also

  • Work Order Maintenance
  • MRP Work Order Recommendations

Compiled in Program Version 6.00.

Class wwkoopmaint (Work Order Operation List Maintenance) last modified 25 May 2022 FP: Process > Work Orders > Select a Work Order > (Change Route button)

Updated on February 6, 2023