人机工程设计方法文件维护人员（HEDAD-M）描述了与维护人员接口的设备和软件，不包括基地级维护。它还描述了维护人员使用的与维护人员相关的软件。该数据项说明（DID）提供了一个数据源，用于评估与维修人员接口的设备和软件在多大程度上满足人因要求和人体工程学标准；它还可以作为技术出版物、维修培训和保障性工程开发的源数据。维修人员接口矩阵提供了有关将人机工程特性纳入系统设计以支持合同里程碑（例如，初步设计审查、关键设计审查）的汇总信息。

The Human Engineering Design Approach Document-Maintainer (HEDAD-M) describes the equipment and software that interface with maintainers, excluding depot-level maintenance. It also describes the maintainer-related software used by maintainers. This data item description (DID) provides a source of data to evaluate the extent to which equipment and software interfacing with maintainers meets human performance requirements and human engineering criteria; it may also serve as source data for the development of technical publications, maintenance training, and supportability engineering. The Maintainer Interface Matrix provides summary information regarding incorporation of human engineering features into system design in support of contract milestones (e.g., Preliminary Design Review, Critical Design Review).