软件/硬件设计说明（SHDD）描述了系统或子系统范围内的设计、计算机软件配置项（CSCI）设计、固件配置项，以及每个直至计算机软件组件（CSC）/单元的体系结构设计。还应包括待实施的详细设计。SHDD可由外部接口的接口设计说明（IDD）（DI-IPSC-81436A）和数据库设计说明（DBDD）（DI-IPSC-81437A）补充。与接口有关的设计可在外部接口的SHDD或IDDs中呈现。与数据库相关的设计可以在SHDD或DBDDs中呈现。SHDD及其相关的IDD和DBDD被用作进一步系统、子系统、软件和固件开发的基础。在DID DI-IPSC-82284中，术语“系统”可解释为“子系统、CSCI、软件和/或固件”（如适用）。 最终文件的标题应为软件/硬件设计说明（SHDD）。

The Software/Hardware Design Description (SHDD) describes the system-or subsystem-wide design, Computer Software Configuration Item (CSCI) design, firmware configuration item, and the architectural design of each down to the Computer Software Component (CSC)/unit. The detailed design to be implemented shall also be included. The SHDD can be supplemented by Interface Design Descriptions (IDDs) (DI-IPSC-81436A) for external interfaces and Database Design Descriptions (DBDDs) (DI-IPSC-81437A). Design pertaining to interfaces can be presented in the SHDD or IDDs for external interfaces. Design pertaining to databases can be presented in the SHDD or DBDDs.The SHDD, with it associated IDDs and DBDDs, is used as the basis for further system, subsystem, software, and firmware development. Throughout DID DI-IPSC-82284, the term "system" can be interpreted to mean "subsystem, CSCI, software and/or firmware" as applicable. The resulting document shall be titled Software/Hardware Design Description (SHDD).