PFV on a napkin

The whole method. Rough math on purpose — good enough to point at the problem.

1 Pick one thing you do over and over:

2 How many are open right now?

3 How many finish in a week?

Any period works — use the one you can actually count.

— weeks each (open ÷ finished = how long each one really takes)

4 Now take a single one of those and add up the honest hands-on hours somebody actually spends on it, start to finish:
—% is real work · —% is waiting

5 In that same one, the longest single wait — the one place it sits still the longest, in days:

6 Fix the biggest wait first. Then count again.

Napkin math: lead time = open ÷ finished-per-period (Little’s Law) · a week ≈ 40 working hours · nothing you type leaves this page.

Want the real thing? Try PFV →
Or watch this napkin do its work on a real process: Climb →