I am looking for best practices for keeping track of inventory on the following types of bulk items.
- Small Washers and Screws (box of 50)
- Tape (roll of x feet)
- Retaining Clips (box of 25)
Due to their size and unit of measure, the items above are not generally consumed individually on Work Orders. For instance, a technician may use 4" inch increments of tape on 100 Work Orders. Since the unit of measure is "Roll," rather than "Inches," the technician cannot accurately deplete the stock by adding the portion used to the Work Order. 
Is there an acceptable way to reduce the tape roll inventory when the roll is depleted?