This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Designation: F2446 - 04 (Reapproved 2018) An American National Standard INTERNATIONAL Standard Classification for Hierarchy of Equipment Identifiers and Boundaries for Reliability, Availability, and Maintainability (RAM) Performance Data Exchange1 This standard is issued under the fixed designation F2446; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope mendations issued by the World Trade Organization Technical 1.1 This classification is to serve as an international stan- Barriers to Trade (TBT) Committee. dardformarineequipmentnomenclature,taxonomy,hierarchi- 2. Referenced Documents cal data structure,uniqueidentifiers,andboundarydefinition for the consistent acquisition and exchange of equipment RAM 2.1 ISO Standards:2 performance data. The standard addresses the classification of ISO3166-1:1997Codes for theRepresentation of Names of mechanical and software products. Countries and Their Subdivisions Part 1: Country Codes, 1997 1.2 RAM in an acronym for Reliability, Availability, and ISO 10303 Industrial Automation Systems and Integration Maintainability where: Product Data Representation and Exchange 1.2.1Reliabilityistheprobabilitythat an itemcanperform ISO 13584 Industrial Automation Systems and Integration a required function under given conditions for a given time Parts Library interval (tl, t2). It is generally assumed that the item is in a ISO/IEC TR 12182 Information Technology Categoriza- state to perform this required function at the beginning of the tion of Software, Technical Report, 1998 time interval. ISO/TC 67/WG 4 ISO/FDIS 14224:1998(E), Petroleum and 1.2.2 Availability is the probability that an item is in a state Natural Gas Industries Collection and Exchange of to perform a required function under given conditions at a Reliability and Maintenance Data for Equipment, 1998 given instant of time, assuming that the required external 2.2 Other Standards: resources are provided. Center for Chemical Process Safety of the American Institute 1.2.3 Maintainability is the probability that a given active of Chemical Engineers Guidelines for Improving Plant maintenance action, for an item under given conditions of use Reliability through Data Collection and Analysis. 19983 can be carried out within a stated time interval, when the IEC 60050-191 International Electrotechnical Vocabulary, maintenance is performed under stated conditions and using Chapter 191, Dependability and Quality of Service4 stated procedures and resources. International Maritime Organization (IMO) Circular letter 1.3 This standard does not purport to address all of the No. 1886/Rev. 2 Implementation of Resolution A.600(15) safety concerns,if any,associated with itsuse.It is the IMO Ship Identification Number Scheme, 20025 responsibilityofthe user of this standardto establishappro- Naval Sea Systems Command Expanded Ship Work Break priate safety, health, and environmental practices and deter- down Structure (ESWBS) for All Ships and Ship/Combat mine the applicability of regulatory limitations prior to use. Systems, Volumes 1 and 2, 19856 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- 2Available from International Organization for Standardization (ISO),ISO ization established in the Decision on Principles for the Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401,1214 Vernier, Development of Interna