Waiting time is summed separately from process time.

highlighted = computed this step

Add waits

Waiting time is the sum of the three wait triangles.

wait total=30+60+30\text{wait total}=30 + 60 + 30
Waits and lead timeWait triangles are included in lead time even though they are not process time.waits and lead timeprocess 9; wait 120; lead 129wait30Order Entryprocess 2wait60Pickprocess 4wait30Packprocess 3stepwait beforeprocessOrder Entry302Pick604Pack303process total9wait total120lead time129efficiency3/43deterministic snapshot only

Wait total

Total waiting time is 120 minutes.

30+60+30=12030 + 60 + 30 = 120
Waits and lead timeWait triangles are included in lead time even though they are not process time.waits and lead timeprocess 9; wait 120; lead 129wait30Order Entryprocess 2wait60Pickprocess 4wait30Packprocess 3stepwait beforeprocessOrder Entry302Pick604Pack303process total9wait total120lead time129efficiency3/43deterministic snapshot only