Process Control is a statistics and engineering discipline used to control a specific process. A process converts input to output. Process Control assures the output produced by the process is within predefined specifications. Visual work instructions help achieve process control by showing operators responsible for a process how to perform the work.

The whole concept of lean continuous improvement is dependent on process control to define the parameters of the existing process. The existing process parameters are used as the benchmark to quantify the benefits derived from lean continuous improvement initiatives. When a new leaner process is validated, the old process control standard should be updated to reflect the new validated improvements. The new standards then form the benchmark for the next round of lean continuous improvement efforts.

The routine portion of Strategy Execution depends on process control to assure that all business critical repetitive processes are consistently performed within their predefined specifications. Any organization that is not capable of controlling its repetitive processes will never be able to execute their strategy.

The Farmers described in the next chapter are primarily responsible for following the existing defined processes. The Hunters described in the next chapter are primarily responsible for leading the lean continuous improvement efforts that result in improved process control standards.