Which IDEF method would you use for capturing software interfaces?

IDEF0 is the appropriate method for capturing software interfaces because it focuses on functional modeling, which allows for the representation of processes, inputs, outputs, controls, and mechanisms. This method is particularly useful for defining the functions of a system, detailing how various components interact with each other and their data flows. In the context of software interfaces, IDEF0 can effectively illustrate how different software components exchange information, ensuring that the functional requirements and the interactions between those components are well understood.

By using IDEF0, one can create diagrams that depict the high-level view of the system's operations and the interfaces associated with each function, facilitating discussions about system integration and software design. This functional view is crucial when considering the complexities of software development and how different parts of a system will communicate through defined interfaces.

The other methods listed serve different purposes; for instance, IDEF1 is primarily concerned with information modeling, IDEF3 focuses on process description capturing, and IDEF2 is related to simulation modeling. Each of these has its strengths but does not specifically target the functional and interface aspects of software in the way that IDEF0 does.