PD IEC TR 62500:2024

Process management for avionics. Highly severe stress tests for operating margins identification and robustness improvement of avionics equipment. Application guidelines. | Status: Current

1 Scope This technical report considers the targets assigned to highly severe stress tests for operating margins research and robustness improvement of avionics equipment, their basic principles, their scope of application and their implementation process. It is primarily intended for avionics programme managers, electronic equipment project managers, designers, test managers, and dependability team. This document provides guidance which can apply to all avionics programmes and is of primary interest to the original equipment manufacturers (OEMs) in charge of designing, developing and producing equipment built for these programmes, for obtaining early equipment maturity.

NOTE 1 Highly severe stress tests approach is often an industrial will in a global lifecycle cost effective approach (see the Introduction) and it is not required at certification level. Moreover, customers can potentially define, in contract clauses, in-service availability requirements, for example, from the entry into service (EIS) or in operation.

This highly severe stress tests approach is part of the avionics equipment design and development stage, and it can address stresses in mechanical, climatic, electrical, etc., domains.

NOTE 2 The principles and objectives described in this document can apply to all types of equipment used in systems developed in avionics programmes, whatever their nature (electronic, electromechanical, mechanical, electrohydraulic, electro-pneumatic, etc.) and whatever their size, from "low-level" subassemblies (circuit card assemblies (CCAs), mechanical assemblies, connectors, etc.) up to system level groups of equipment.

This document can be used in conjunction with IEC 62429, IEC 62506, or both, with regard to dependability aspects related to equipment consisting of hardware with embedded software.

NOTE 3 This document can provide an aid in an equipment definition justification process (see CEN-CENELEC prEN 9215) which can address:

• • the development of a definition justification dossier (DJD) by bringing data related to equipment margins and to decisions; or
• • the justification of potential future changes made at equipment definition, for example when processing cases of electronic component obsolescence.

For the purpose of this document, if the term "deficiency" is used alone afterwards, it is stated as "built-in deficiency" or "weak point" and encompasses the concept of "deficiency and associated potential malfunction or failure" (see 3.1.1). Although developed for the avionics industry, this document can be used by other industrial sectors at their discretion.