Releasing/Locking Production Resources/ Tools 
Use
When you create or change a production resource/tool (PRT), you can determine whether it is freely available by using the status. You can thus temporarily lock a PRT, which is for instance defective. The status is taken into account when you
Features
How and why you release an individual PRT, depend on the PRT category.

If you check PRT availability in production orders,
See also:
LO - Managing Material Master Data
PM - Structuring Technical Systems
CA - Document Management Guide