For each interface, I considered whether all commands are defined for all ways of invoking them. I verified that the user can (or, as is the norm, can't) do everything via ARexx that the user can do with the application. I'll evaluate the commands for constistency both internally, with ARexx, and with the application. Finally, the commands will be checked to see how easy they are to read, write, and debug.
This interfaces were evaluated in 1991, and most of the programs have changed significantly since then. The programs were:
On to designing the language, back to goals of a design, or up to the contents.
Mike W. Meyer