The maintainability activities conducted during each of the life cycle phases of a product must be consistent with and support the overall objectives for the phases. In the following discussion, maintainability
activities will be discussed in the context of the phase(s) in which they are most applicable. It is not practical to try and address all possible types of products, so the discussion assumes that a major product, such as an aircraft, tank, turbine engine, or similar item, is being developed. It should be obvious that the level of effort and types and scope of activities that would be necessary for a portable, man-carried receiver/transmitter will not be the same as for a new tactical fighter or main battle tank. Figure E-2 summarizes the discussion.