The first component of the change control process is the Change Control Authority (CCA) or a Change Control Board (CCB). A CCA or CCB includes people from both developer and client side.
Whenever a change is required, the CCB decides whether to allow this change to happen or deny it. If it is decided that a change is needed, an Engineering Change Order or ECO is generated. An ECO defines the change to be made, the constraints that must be respected, and the criteria for review and audit. The change control process thus involves the following steps.
Poka-yoke is a QA technique developed by Shingo at Toyota in 1960’s. Poka-yoke devices are mechanisms that lead to prevention of potential quality problem before it occurs or the rapid detection of quality problems if they are introduced.