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Activity time

how long it takes to work on a TASK

Capacity

(1/activity time) how many units worker can make in 1 unit of time

Bottleneck

process step w/ lowest capacity

Flow rate

min (D, process capacity)
demand or capacity constrained?

Utilization

(Rate/Capacity)

Little's Law

I = RT (Flow Rate Flow Time)

Flow Time

time t start from finish on the process
Activity time + wait time

labor utilization

labor content / (productive + idle time per 1 flow unit)

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