Hi,
We are using planning method K (Blow through planning) frequently, Sometimes the demand of the K-planned parts appears in Inventory Part Availability planning, producing alarms that we have a “Negative Projected Onhand”.
Anyone who knows why?
Best answer by ShawnBerk
View originalHow do you have demand for a Planning Method K part? It must be appearing on an order or requisition somewhere, yes? Is it possible that someone is changing the planning method temporarily to something else to fulfill or create a shop order, but forgetting to change it back before MRP runs? The only way to tell this for sure would be to enable the history log on the Inventory Part > Planning Method.
Hi,
Thank you for your answer, I am sure that the planning method on the inventory part has not been changed, but can it be overriden somehow?
When investigating further I found two scenarios.
The first is when the K-planned part is needed by a P-planned part that at the occation has 1 pcs in stock. all demands for the P-planned part is then shown in IPAP and broken down to the K-planned part and it’s components. On the P and K-planned levels, no supplies are shown.
The second scenario is when the K-planned part is included in a product structure for a part that is DOP-controlled. Also here demand seems to be correct on the component level.
Since demand is correct on components in both scenarios I am considering just to ignore the Exception messages. Do you think that would be a risk?
Since you can trace the reasons the item appear in IPAP to two specific scenarios where the demand is coming from a known source, but the supply is from an unusual source, then yes, I think you could be safe in ignoring the Exception message in these two circumstances. It is good to have the investigation and understanding though.
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