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https://issues.apache.org/jira/browse/OFBIZ-1242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12527468
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Mario Cappellato commented on OFBIZ-1242:
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The days to ship are very important for purchase orders. The MRP calculates the
requiredByDate from routing tasks and adding the Days to ship to calculate the
requirementStartDate.
I agree to remove the "ship to day" from the MRP algorithm but I propose to add
a new field (mrpLeadTimeMillis) into ProductFacility and replace the "ship to
day" with this new field in the MRP. Then MRP algorithm will add all the time
mrpLeadTimeMillis to the calculated time of every event.
I don't think that forcing the proposed date by MRP at now if the date is
before of today is a good idea. As is now is better because you have a clear
understanding of how late an order is.
> MRP days to ship and inventory event planned dates issues
> ---------------------------------------------------------
>
> Key: OFBIZ-1242
> URL: https://issues.apache.org/jira/browse/OFBIZ-1242
> Project: OFBiz
> Issue Type: Bug
> Reporter: Si Chen
>
> I noticed a couple of interesting issues with the MRP algorithm:
> It was using ProductFacility.daysToShip to create a buffer time for
> requirements, but it was doing it for all requirements, so even manufactured
> parts were having this buffer time added. I fixed it in 575413 by limiting
> days to ship to only sales order related requirements. However, I believe
> that daysToShip should be eliminated altogether in MRP, because I think this
> field should be used as an average value for customer-related "how long it
> takes to ship this order." The actual time to manufacture or order and
> receive an item may vary, depend on the priority of the order, etc. If a
> buffer process is required, it should be added for example as a manufacturing
> routing task.
> The other issue is that MRP will create inventory events in the past (ie,
> before the time when it's run.) I think we should limit it so that inventory
> events created should be now or in the future.
> If there are no comments to the contrary I will make these changes and commit
> them.
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