Pic1 Every company I’ve worked with performs 3 distinct actions during their design process – Create, Review and Approve. Whether it’s 1 person doing all three or all three spread over 30 people – those steps are always around. After a design is approved there comes the Engineering Change Process. This can be called the ECR, ECN, ECO, DCR, ECRN, ECP, etc. – I’ll call it the EC today.