Lean Manufacturing Tool
Lean Manufacturing is a way of running production so that every step adds value the customer will pay for, and everything else, waiting, excess stock, defects, motion, gets cut.
Loop through five steps arranged in a circle: define value, map the stream, create flow, pull, then pursue perfection.
Reach for this when…
- Inventory is piling up between stations while a machine downstream sits idle.
- Customers complain about lead time, but nobody can say where the delay actually happens.
- You keep adding staff to keep up with orders instead of fixing the process.
How to run it
- Define value from the customer's point of view, not the factory's.
- Map the value stream for one product family, step by step.
- Remove anything that does not add value and let work flow without stopping.
- Let customer demand pull production, rather than pushing to a forecast.
- Repeat the cycle, chasing waste out step by step.
A worked example
Situation. Mehmet Yilmaz ran Yilmaz Mobilya, a furniture workshop in Izmir, Turkey, where finished chairs sat for eleven days before shipping while the varnish booth stood empty half the week.
Applied. He mapped the value stream from timber intake to dispatch and found the bottleneck wasn't the varnish booth at all, it was a single sanding station two people were queuing behind.
Result. He moved a second sander in and resequenced two stations to pull with the sanding rate instead of pushing ahead of it. Lead time dropped from eleven days to four.
The catch
Lean assumes fairly stable, repeatable demand; it strains in businesses where every order is a one-off. Pushed too hard it also strips out the slack that protects a business from a bad week, and staff can experience it as speed-up dressed as improvement.
If the only thing that changed after a Lean push is headcount, you ran a cost-cutting exercise, not Lean Manufacturing.
Origin: Toyota Production System; Womack & Jones