I organise bicycle assembly around the product a customer can actually receive, rather than the activity our busiest workstation can report.
The figure I liked was 420. It described bicycles assembled during five selected days in 2018, and it appeared to reward the attention I had given to workstation output. The quality-release total was 300. Another 120 were awaiting release. I had not invented the assembly activity, but I had allowed a local measure to carry a meaning it could not support. The customer could not receive an internal production count in place of the product and agreement we owed them.
A local activity measure becomes dangerous when we treat it as the customer outcome. I want the operating conversation to follow the unfinished work, the release decision and the agreement that still separates a busy workshop from a fulfilled order.