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MRP/Workorder: How to place fixed time work orders (machine startup and shutdown)

Casper Francke
on 7/18/14, 6:40 PM 1,218 views

I know that I can encode machine startup und shutdown times on a work center with the fields "Time before prod." and "Time after prod.". However, I want to track the time for machine startup and shutdown as separate work orders. Now I don't manage to get a work order line which is fixed and independently on how many units the manufacturing order is about. How should I encode the work centers and routing to achieve this?

Example: Lets produce 1000 pcs and it takes 1.5 hours to start and 2.5 hours to shut down and cycle time is 1 min.

The work order should be:

Sequence; Work Order; Work Center; Number of Cycles; Number of Hours

10; Start the machine; Machine XYZ; 0; 1:30   (or 1000; 1:30, I don’t care)

20; Produce; Machine XYZ;1000; 16:40

30; Clean the machine; Machine XYZ; 0; 2:30 (or 2000; 2:30)


Now let’s say I produce 500 pcs with the same routing. The work orders should look like this:

10; Start the machine; Machine XYZ; 0; 1:30    (or 1000; 1:30, I don’t care)

20; Produce; Machine XYZ;1000; 8:20 (<----- This is the only line that should change)

30; Clean the machine; Machine XYZ; 0; 2:30 (or 2000; 2:30)

Could someone please tell me how to configure work center / routing in order to get this result?

When I try, the field “Number of hours” in work order line is always multiplied with units produced unless the field "Capacity per Cycle" on work center is converting to plus infinite which I think is a very strange setting to have.

Please help and thanks in advance.

Tired on runbot 19.07.2014 around 00:30

Version 8

Build 07003-8-0-869b64


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Asked: 7/18/14, 6:40 PM
Seen: 1218 times
Last updated: 3/16/15, 8:10 AM