PCE (Process Cycle Efficiency) is a Lean metric that indicates the percentage of value-added time in a process, reflecting its efficiency. The higher the value, the more efficient the process is. PCE helps identify improvement opportunities and the proportion of non-value-added activities that need to be addressed through projects. To calculate PCE a process is divided into value-added time (VAT) and non-value-added time (NVAT). The cycle time for each activity is estimated, and the values are summed separately for VAT and NVAT. PCE is calculated by dividing the value-added time by the total cycle time of the process and multiplying the result by 100. By determining a PCE value you establish a baseline for efficiency, which can be used for further analysis. After completing a project, a before-and-after comparison can be performed.