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Significance and Use
4.1 Capturing high quality RAM performance data requires careful and consistent collection of equipment failure and repair data, operating hours, and repair time. A standard hierarchy of equipment boundaries has been needed for machinery data exchange among the stakeholders in shipbuilding, ship classification, and ship operations.
4.2 Industry and government will use a world standard method for setting the hierarchy of indentures and boundaries required for assigning failure and repair events to equipment for the tracking and calculation of equipment RAM performance.
4.3 Agreed boundaries and equipment identifiers make it possible to share equipment data among organizations, benchmark equipment performance, perform modeling and simulation of current and proposed systems, or use performance data to improve operations of commercial and naval vessels.
4.4 RAM analysis is primarily based on the observation of individual components among which identical items contribute to the same data sample. This classification is designed to be used for the identification of individual (unique) components in such a way that identical components can be identified within a given data sample.
1.1 This classification is to serve as an international standard for marine equipment nomenclature, taxonomy, hierarchical data structure, unique identifiers, and boundary definition for the consistent acquisition and exchange of equipment RAM performance data. The standard addresses the classification of mechanical and software products.
1.2 RAM in an acronym for Reliability, Availability, and Maintainability where:
1.2.1 Reliability is the probability that an item can perform a required function under given conditions for a given time interval (t1, t2). It is generally assumed that the item is in a state to perform this required function at the beginning of the time interval.
1.2.2 Availability is the probability that an item is in a state to perform a required function under given conditions at a given instant of time, assuming that the required external resources are provided.
1.2.3 Maintainability is the probability that a given active maintenance action, for an item under given conditions of use can be carried out within a stated time interval, when the maintenance is performed under stated conditions and using stated procedures and resources.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ISO StandardsISO 10303 ISO 13584 ISO 3166-1:1997 Codes for the Representation of Names of Countries and Their Subdivisions Part 1: Country Codes, 1997 ISO/TC 67/WG 4 ISO/FDIS 14224:1998(E), Petroleum and Natural Gas Industries Collection and Exchange of Reliability and Maintenance Data for Equipment, 1998
Other StandardsCenter for Chemical Process Safety of the American Guidelines for Improving Plant Reliability through Data Collection and Analysis, 1998 Available from American Institute of Chemical Engineers (AIChE), 120 Wall Street, FL 23, New York, NY 10005-4020, https://www.aiche.org. International Maritime Organization (IMO) Circular Implementation of Resolution A.600(15) IMO Ship Identification Number Scheme, 2002 Available from International Maritime Organization (IMO), 4, Albert Embankment, London SE1 7SR, United Kingdom, http://www.imo.org. Naval Sea Systems Command Expanded Ship Work Breakdown Structure (ESWBS) for All Ships and Ship/Combat Systems, Volumes 1 and 2, 1985 Available from Naval Sea Systems Command, 1333 Isaac Hull Avenue, SE, Washington Navy Yard, DC 20376, https://www.navsea.navy.mil.
ICS Number Code 35.240.50 (IT applications in industry); 47.020.01 (General standards related to shipbuilding and marine structures)
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ASTM F2446-04(2018), Standard Classification for Hierarchy of Equipment Identifiers and Boundaries for Reliability, Availability, and Maintainability (RAM) Performance Data Exchange, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top