ASD-STAN/D 1/WG 16 - RAMS (Reliability, availability, maintainability and safety)

The purpose of this document is to provide customers and their suppliers with a document specifying the notions of product reliability "construction" and "management".
It offers programme directors and project managers information likely to help them:
-   to determine the tasks to be performed and the application procedures, according to the specific nature of the programme and its goals;
-   to define and implement the provisions necessary for performing these tasks;
-   within programme execution, to situate the various tasks involved in constructing and managing the reliability of a product.
This document applies to all programmes (in particular aeronautical, space and armament programmes).
These reliability construction procedures concern not only all the products and its constituents covered by these programmes, but also the means and manufacturing processes to be implemented for their realization.
The provisions of this document can be negotiated at all levels between the parties directly concerned by a given programme. This implies, on the part of the customer, that each lower level is provided with the information necessary to perform tasks and meet the specified targets.

The success of a programme depends on optimizing the compromise between the expected technical and operational performance of the products, the cost of these products and the lead-time to realize them.
In this context, products dependability and safety control is a key activity which cannot be separated from other product performance control or programme management.
This document is thus one of the documents supporting EN 9200 concerning the programme management specification.
The purpose of this document is to provide customers and their suppliers with a document specifying the notions of "construction" and "management" of product dependability and safety (RAMS).
It offers programme directors and project managers information likely to help them:
-   determine the tasks to be performed and the application procedures, according to the specific nature of the programme and its goals;
-   define and implement the provisions necessary for performing these tasks;
-   within programme execution, situate the various tasks involved in constructing and managing the RAMS of a product.
This document applies to all programmes that involve customer/supplier relation.
RAMS management concerns not only all the products covered by these programmes, but also the components of these products and the production and support resources and processes to be implemented.
The provisions of this document can be negotiated at all levels between the parties directly concerned by a given programme. This implies, on the part of the ordering parties, that each lower level is provided with the information needed to perform the tasks and meet the specified targets. This also implies, on the part of suppliers, an escalation of information pertaining to the RAMS results of the products for which they are responsible.
This document is mainly concerned with the technical aspects, aspects of a legislative (in particular safety at work and regulatory conformity) and confidential nature are not dealt with in this document.

The purpose of this document is to:
-   identify and describe, in a structured way, the principles of the integrated logistic support (ILS) activities and tasks for the main types of stakeholders in the system life cycle, from the expression of need to disposal;
-   place the activities, tasks and ILS deliverables within the programme execution;
-   identify the main selection and sizing of activities and tasks criteria according to the nature and the requirements of the programme;
-   control the relations with the other aspects of programme management.
This document covers the following subjects:
-   management of ILS (definition, implementation and running of the processes);
-   expression of the support requirements;
-   elaboration of the contracts (e.g. for development, maintenance, supply
-   implementation of the tasks and processes.
This document is also related to the following subjects:
-   relations with costs and lead times control, configuration management, performance and RAMS management, quality assurance, documentation management;
-   regulations (e.g. information system security, export controls, safety at work);
-   human and organisational factors (HOF);
-   environment (e.g. RoHS, REACh);
-   information systems (IS) and the links between them;
-   logistics information systems (LIS);
-   in-service support (ISS) activities;
-   configuration management of ILS objects;
-   life cycle.
The following stakeholders are concerned by ILS:
-   users in the broadest sense: operators, maintenance operators, administrators, dismantlers of the system, trainers;
-   the customer, who:
-   prepares technical and contractual specifications of need with which the system shall comply,
-   sets up the funding of the programme,
-   oversees the realization and commissioning of the main system and of the support system,
-   facilitates the feedback;
NOTE 1   At the highest level of the system, the customer can also be referred to as the "project owner".
NOTE 2   The "main system" can also be referred to as the "system of interest".
-   the supplier(s) who deliver a system (main and support) to the customer, which meets the performance specifications, including the regulatory requirements, on time and for the agreed cost, throughout the system life cycle;
NOTE   At the highest level of the system, the supplier can also be referred to as the "industrial prime contractor".
-   the regulatory authorities that supervise and approve the support processes and equipment, as needed.
The principles laid down in this document can be applied, after adaptation, to all the customer/supplier relations resulting from the breakdown of the main contract into sub-contracts.