calculate your cost
You bought it. Where is it?
If you can't find it, you bought it twice. See what material delays are costing your project in about three minutes.
The problem
THE #1 REASON PLANNED WORK SLIPS? MATERIALS.
The crew shows up. The part doesn't. Now you're paying standby labor, hot-shot freight, and a duplicate PO for something that's been on site for three weeks. These costs hide inside labor and expediting, which is why they survive project after project.