Defining universal Lean metrics

We've already introduced some Lean metrics in the previous chapter on current-state value stream mapping. However, we did not take the time to define Lean metrics other than metrics explicitly related to software delivery performance. Additionally, there are many traditional Lean metrics that you and your VSM team need to understand how to use, as identified in the following list:

• Cycle time (CT): The CT is the timespan between starting and finishing a process or a value stream activity. The CT is actually a measure of throughput (units per period of time). So, if we can produce 40 widgets in a 40-hour work week, our cycle time is The VSM team only includes working time and does not include work in progress (WIP), nor the waiting time between value stream activities. However, the CT is not always all value-adding time (VT). There can be elements of non-value-adding work within the activity in the form of waste. This waste includes defects...