ECSS-Q-30-02A Failure modes, effect and criticality analysis (FMECA) (7 September 2001)

This Standard has been cancelled and replaced by ECSS-Q-ST-30-02C (6 March 2009).


This Standard is part of a series of ECSS Standards belonging to the ECSS-Q-30 “Space product assurance – Dependability”.

This Standard defines the principles and requirements that shall be adhered to with regard to failure modes, effects and criticality analysis (FMECA) implementations in all elements of space projects in order to meet the mission performance requirements as well as the dependability and safety objectives, taking into account the environmental conditions.

This Standard defines requirements and procedures for performing a FMECA to systematically evaluate and document the potential impact of each failure (functional, hardware, or process) on product operation and mission success, personnel and product safety, maintainability and maintenance requirements. Recommended forms and formats are identified in this Standard.


This Standard applies to all elements of space projects where failure modes, effects and criticality analyses are part of the dependability programme.

Application specific integrated circuits (ASICs), integrated circuits, and software are treated as isblack boxeslk. Software reactions to hardware failures are ad- dressed by the hardware-software interaction analysis (HSIA).

Human errors are addressed in the process FMECA. Human errors may also be considered in the performance of a Functional FMECA.


The extent of the effort and the sophistication of the approach used in the FMEA/ FMECA depend upon the requirements of a specific programme and should be tailored on a case by case basis.

The approach is determined in accordance withthe priorities and ranking afforded to the functions of a design (including operations) by risk analyses performed in accordance with ECSS-M-00-03, beginning during the conceptual phase and repeated throughout the programme. Areas of greater risk, in accordance with the programme risk policy, should be selectively targeted for detailed analysis. This is addressed in the RAMS and risk management plans.

NOTE Tailoring is a process by which individual requirements or specifications, standards and related documents are evalu- ated and made applicable to a specific project by selection, and in some exceptional cases, modification of existing or addition of new requirements.