How it works
In a stable process, average work in process equals average throughput rate times average flow time. This form solves for average work in process; enter the known quantities in Hourly throughput, Average flow time.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Hourly throughput | 20 /h | Formula symbol: rate. Required unit: /h. Must be greater than zero. |
| Average flow time | 5 h | Formula symbol: time. Required unit: h. Must be greater than zero. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Hourly throughput
- 20 /h
- Average flow time
- 5 h
Complete example results
- Average work in process
- 100
Reading the result
The result solves for average work in process from the entered quantities. Check the result unit and the formula conditions before using it.
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
When can I use the average work in process result?
Averages need the same process boundary and time unit. A transient queue spike or a single-day observation does not establish stability.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method sources: web.mit.edu