Examples
Examples
Try the starting example
- Stable throughput (units/hour)
- 12
- Mean flow time (hours)
- 2
- Observed average WIP for consistency check (units)
- 25
- WIP predicted from flow and throughput (units)
- 24
- Flow time implied by observed WIP (hours)
- 2.083333
- Observed minus predicted WIP (units)
- 1
Try another scenario
- Stable throughput (units/hour)
- 15
- Mean flow time (hours)
- 2
- Observed average WIP for consistency check (units)
- 25
- WIP predicted from flow and throughput (units)
- 30
- Flow time implied by observed WIP (hours)
- 1.666667
- Observed minus predicted WIP (units)
- -5
Calculation method
Calculation method
WIP predicted from flow and throughput (units)
L=lambda*W.
Flow time implied by observed WIP (hours)
observedWIP/lambda.
Observed minus predicted WIP (units)
observedWIP-lambda*W.
Symbols and units
- a
- Stable throughput (units/hour)
- b
- Mean flow time (hours)
- c
- Observed average WIP for consistency check (units)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Little’s law worksheet for stable long-run averages measured over the same system boundary and time basis. All three values explicit for consistency; not a transient queue simulation. Supported limits: throughput>0; flow>=0; observedWIP>=0.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.