ECSS-Q-20-04A – Critical-item control (31 March 2005)

This Standard has been cancelled and replaced by ECSS-Q-ST-10-04C (31 July 2008).


Early identification of potential critical items provides valuable inputs to design engineering for their avoidance or elimination. Critical-item control provides management with acceptance rationale for those critical items that cannot be eliminated from the critical-item list, and identifies the means by which emanating risks can be controlled.


This Standard defines the principles, process, implementation and requirements for critical-items control.