Little's Law Calculator Tutorial

When to use this tool

Little's Law states that the average number of items in a process is the product of the average rate at which items leave the process and the average time each item spends in the process.

Little's Law can be expressed as an equation that can be used to balance capacity with demand. The equation states:

• Throughput Volume Per Unit of Time = Items-In-Process/Cycle Time

Or, solving for the other components:

• Items-In-Process = Throughput Volume Per Unit of Time*Cycle Time

Or:

• Cycle Time = Items-In-Process/Throughput Volume Per Unit of Time