Completed Production Order and Item No Longer Display on Workbench
The MSW displays completed production orders where the production order due date is within the history/future horizon that you define through the Options pull-down menu by selecting Preferences, then the Search tab in the Planning and Scheduling Workbenches. When the item you produced has no other active supply/demand records (mrp_det) records, the item/order no longer displays on the workbench.
Probable Cause
If an item has no mrp_det records in the system for any of the sites, then that item and its production orders do not display. For example, if you have an item with just one production order in the system, and you receive the production order but do not close it, the production order can have a zero open quantity but an exploded status. Normally, the order displays as a search result, but once the production order was fully received, the system deleted the mrp_det record for that order. Since that was the only production order for the item and no other mrp_det records exist, that item and the order do not display.