https://articlesandblogslist.blogspot.com/2022/01/maintenance-planning-scheduling-unit.htm l:- Plant capacity can be increased by putting the ‘hidden factory’ to work. The ‘hidden factory’ is all the production capacity lost due to the unnecessary waste of operating time and production rate. It can total to more than half of the plant and equipment capacity in those organizations that are not aware of their time and production wastes.