MES PW67602 is a Mazda engineering standard applying to components, and the designator reflects the way the manufacturer organises its documents: the letters identify an engineering standard, the letters after them identify the discipline or the system group, and the number identifies the individual requirement within it. Japanese vehicle manufacturers have historically written their component requirements in close co-ordination with the suppliers who make the parts, so a requirement of this kind is often developed jointly with a tier one supplier and its wording reflects the test facilities that the supply base actually has. In practice the standard states the disturbance a component must tolerate and the disturbance it may emit at a given mounting position, and the applicable test methods are those of the manufacturer or, where the manufacturer so provides, the corresponding methods of the Japanese industry standards.