WIP and Little's Law

Interpret WIP

WIP is a count of jobs inside the system.

highlighted = computed this step

Interpret WIP

WIP means jobs in the system, not jobs finished in one hour.

WIP=36 jobs in process\text{WIP} = 36\text{ jobs in process}
WIP and flow timeThe chart shows WIP from throughput times flow time.Little's Law WIP and flow timethroughput 12 jobs/hour; flow time 3 hours; WIP 36 jobscasethroughputflow timeWIPchangebase12336baselinewhat-if12224reduction 12basebase WIP 3612 x 3what-ifwhat-if WIP 2412 x 2what-if WIP 24; reduction 12deterministic Little's Law arithmetic only