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The interface control document is one of the components of the Design Document. It is used to describe the inputs and outputs of a single system, the interface between two systems or the interface protocol between physical components.

Use/relationship: The Interface Control Document (ICD) provides a record of all interface information (such as drawings, diagrams, tables, and textual information) generated for the project.

The Interface Control Document (ICD) created using this template will define one or more interfaces between two systems. Overall, an ICD can cover requirements for any number of interfaces to a system. Note: If there are multiple interfaces, they can be listed in a single ICD or multiple ICDs as needed.

An interface requirement is a system requirement that involves an interaction with another system. The format of the interface requirement is such that it includes a reference (pointer) to the specific location in the definition document that defines the interface.

The interface control document is one of the components of the Design Document. It is used to describe the inputs and outputs of a single system, the interface between two systems or the interface protocol between physical components.

In summary, an IDD must cover: Interface and system overview. Constraints and limitations. Transaction processing and design patterns. The transaction flow. The message structure and protocols. The message fields. Security. Communications and data transfer.

For each interface, the ICD provides the following information: A description of the data exchange format and protocol for exchange. A general description of the interface. Assumptions where appropriate. Estimated size and frequency of data exchange.