Data Item Description (DID): Interface Design Description (IDD)

3.1 The Interface Design Description (IDD) describes the interface characteristics of one or more items which may typically be referred to as systems, subsystems, Hardware Configuration Items (HWCIs), Computer Software Configuration Items (CSCIs), manual operations or other system components. An IDD may describe one or more interfaces.
3.2 The IDD is used in system development to communicate and control external interface design, at the most detailed level of definition of external interfaces, and consistent with requirements contained within the companion Interface Requirements Specification (IRS) (see PPA-002234). The IRS specifies interface requirements; the IDD describes interface characteristics selected to meet those requirements. The IDD can also be used to supplement the System/Subsystem Design Description (SSDD) (see PPA-003461), Software Design Description (SDD) (see TAAME04-001132), or Database Design Description (DBDD) (see TAA-ME04-001134).