Operations and lean
Schedule production, plan capacity, find the bottleneck, and cut changeover time and scrap using real production data.
6 articles
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Operations and lean
Add a shift, buy a machine or recover lost hours?
Recover lost hours first, add a shift when you can staff it and buy a machine when you can’t. Each route priced per good part on one CNC lathe, by hand.
Ulises Carrasco ·
Operations and lean
When to replace a spreadsheet production schedule
An Excel schedule fails once one change has effects nobody sees. Learn the five signs, what each replacement checks, and how to move your open jobs across.
Ulises Carrasco ·
Operations and lean
Production scheduling on real run rates
Schedule from the rate each machine really runs, not its ideal cycle time. Turn measured OEE factors into job durations, pick a rate and load machines safely.
Ulises Carrasco ·
Operations and lean
How to find the bottleneck machine, with numbers
The bottleneck is the machine with the least spare time for its load. Calculate load, check busy time and queues, and prove it with lost hours. Worked example.
Ulises Carrasco ·
Operations and lean
Why reworked parts don’t count in first pass yield
Reworked parts aren’t good parts in first pass yield or OEE quality. Work FPY, final yield and scrap rate on one batch, and see why quality and scrap disagree.
Applications Engineering Team ·
Operations and lean
Measure changeover time before you try to cut it
Time changeovers from last good part to first good part, log internal and external work, and compare by type and median. A worked mold change shows how.
Applications Engineering Team ·