Capacity, Bottleneck, and Slack

Slack

Slack shows how much room remains between demand and line capacity.

highlighted = computed this step

Slack Formula

Slack is capacity minus demand when demand fits inside capacity.

slack=capacity−demand\text{slack}=\text{capacity}-\text{demand}
Base bottleneckThe processline visual marks the bottleneck step by role and text.base bottleneck stepdemand 18/houroutput 18/hourunmet 0/hourStep 1capacity 30/hutil 3/5Step 2capacity 20/hutil 9/10bottleneckStep 3capacity 25/hutil 18/25

Slack

The line has 2 units per hour of slack.

20−18=220 - 18 = 2
Base bottleneckThe processline visual marks the bottleneck step by role and text.base bottleneck stepdemand 18/houroutput 18/hourunmet 0/hourStep 1capacity 30/hutil 3/5Step 2capacity 20/hutil 9/10bottleneckStep 3capacity 25/hutil 18/25