The most common process of continuous
improvement is the PDCA Cycle shown in “Fig.1”
which was first developed by Walter Shewhart in
the 1920s and promoted by quality preceptors Dr
Edwards Deming. PDCA-cycle consists of four
consecutive steps, as follows:
• Plan – Perception for improvement
• Do – Implementation of the changes that is
decided in the Plan.
• Check – a) Control and measurement of processes
and products in accordance with changes in previous
steps