I have a case where Surplus reservations seems to be a problem.

The planning is going very very slow, when there are a lot of reservations (type =Surplus) in table 337. It seem that the The planning result is wrong too. I have a customer that have more than 2000 (surplus records) in an item. The customer are using Item Tracking on all levels in the BOM and with Expiration Date.

I looked into the planning result and discover that Surplus might be the issue.

If I delete the Surplus lines and then do the Production Planning, the planning is going very fast and the result seems right.

Some items are using Order, and some are using Lot-For-lot.

What is the effect of deleting the Surplus lines?