It is twenty to eight on a Wednesday in Lapeer County. Your tech is in a customer's basement with the diagnosis done, and the part he needs is on a shelf back at the shop instead of on his van. He heads upstairs to explain, then drives to the supply house and waits in line behind three other contractors.
With a real van stock program, every truck carries the same standard list, built from what your techs actually use on most calls. Parts come off the van in your software on each job, and a restock list is ready before the tech heads home, so the van is full again by morning.
Most jobs now finish on the first visit. Techs stop hoarding parts in their own corners, you can see what every van is worth, and the supply house becomes a planned stop instead of a daily habit.