Gives a comprehensive basis for the collection of Reliability and Maintenance (RM) data in a standard format in the areas of refining, production, drilling and transport by pipeline of natural and petroleum gases. Gives guidelines for the collection, specification and quality assurance of RM data, facilitating the collection of RM data. The data will enable the user to quantify the reliability of the equipment and to compare the reliability of equipment with similar characteristics. By analysing the data, reliability parameters can be determined for use in maintenance, design and operation. Not applicable in the method of analysis for RM data.