This technical specification specifies the targets assigned to highly accelerated tests, their basic principles, their scope of application and their implementation procedures. It is primarily intended for programme managers, designers, test managers, and RAMS experts to facilitate the draft of the specification and execution of highly accelerated tests. This guide is applicable to all programmes and is of primary interest to the industrial firms in charge of designing, developing and producing equipment built for these programmes, and also their customers who, in drafting contractual clauses, may require that their suppliers implement highly accelerated tests. NOTE This technical specification applies to all types of equipment used in systems developed in these programmes, whatever their nature (electronic, electromechanical, mechanical, electro-hydraulic, electropneumatic, etc.) and whatever their size, from "low-level" subassemblies (PCBs, mechanical assemblies, connectors, etc.), up to system level groups of equipment.