This part of IEC 60300 gives guidance to managers and technical and financial personnel on the basic principles of maintainability and maintenance activities that are applicable to any organization.. This document describes: the value and nature of maintainability and maintenance characteristics; the interfaces between maintainability and related dependability attributes of reliability and supportability, as well as potential trade-offs that can be made through the interfaces during the life cycle of an item; the elements of maintainability and maintenance programmes; the application of maintainability and maintenance programmes throughout the life cycle; assurance of meeting maintainability and maintenance requirements; maintainability and maintenance data and information management. This document is applicable to equipment, software, services, or structures, and gives guidance on matters of common interest to any business supplying, purchasing or sustaining products, services, or structures.