To run a continuous improvement process, Kaizen makes use of a repetitive framework: The PDCA-Cycle.
Acting on iterative PDCA-Cycles (Plan, Do, Check, Act) implies concise definitions of measures, their execution and finally the contemplation of the whole process.
The final step includes the KPI-based comparison of targets and actual conditions to rationalize progress and deduce further steps: learn from your mistakes and repeat the whole process or succeed and jump to the next challenge.