What-If and Scope

Honest Changeover Scope

The final lesson states the boundary: this is deterministic changeover arithmetic.

highlighted = computed this step

Deterministic

The comparison uses deterministic setup and run times.

deterministic setup and run arithmetic\text{deterministic setup and run arithmetic}
Reduced setup what-ifThe chart compares the base setup case with a smaller setup-time what-if.reduced setup what-ifsetup 30; run 2/unit; batch 20batch 1setup 30run 4070 minbatch 2setup 30run 4070 minbatch 3setup 30run 4070 minreduced setup10run 4050 min/batchcasesetupruntotalavg/unitbase901202107/2reduced301201505/2saved time 60deterministic changeover arithmetic only

Not sequencing

It does not prove a sequencing optimum or staffing plan.

outside scope: sequencing optimum and staffing\text{outside scope: sequencing optimum and staffing}
Reduced setup what-ifThe chart compares the base setup case with a smaller setup-time what-if.reduced setup what-ifsetup 30; run 2/unit; batch 20batch 1setup 30run 4070 minbatch 2setup 30run 4070 minbatch 3setup 30run 4070 minreduced setup10run 4050 min/batchcasesetupruntotalavg/unitbase901202107/2reduced301201505/2saved time 60deterministic changeover arithmetic only

Not an impact proof

It does not prove quality, queue, or SMED impact.

outside scope: queues, quality, and SMED impact\text{outside scope: queues, quality, and SMED impact}
Reduced setup what-ifThe chart compares the base setup case with a smaller setup-time what-if.reduced setup what-ifsetup 30; run 2/unit; batch 20batch 1setup 30run 4070 minbatch 2setup 30run 4070 minbatch 3setup 30run 4070 minreduced setup10run 4050 min/batchcasesetupruntotalavg/unitbase901202107/2reduced301201505/2saved time 60deterministic changeover arithmetic only

Honesty note

This is deterministic changeover arithmetic only. It does not model stochastic queues, quality, staffing, a sequencing optimum, or proof of SMED impact.

deterministic changeover arithmetic only\text{deterministic changeover arithmetic only}
Reduced setup what-ifThe chart compares the base setup case with a smaller setup-time what-if.reduced setup what-ifsetup 30; run 2/unit; batch 20batch 1setup 30run 4070 minbatch 2setup 30run 4070 minbatch 3setup 30run 4070 minreduced setup10run 4050 min/batchcasesetupruntotalavg/unitbase901202107/2reduced301201505/2saved time 60deterministic changeover arithmetic only