There are two options of filter in the Master planning parameters form, to speed up Master plan when you have large number of inactive items. Pre-processing: Automatically filter by items with direct demand Post-processing: Automatically filter by items with direct demand When coverage settings for items show a minimum inventory level of 0, planned orders would be generated to correct this physical negative stock to 0. However, the queries that are looking for demand do not look at negative on-hand inventory. Please consider to improve such a feature.