* "Interaction design for complex problem solving: Developing useful and usable software" (a book by B. Mirel, 2004)
* Cognitive Dimensions Framework (the best place to start is probably http://www.cl.cam.ac.uk/~afb21/publications/BlackwellGreen-C... )
But as others have pointed out, it depends on what kind of complex system you are talking about.
But it's a book.
* "Interaction design for complex problem solving: Developing useful and usable software" (a book by B. Mirel, 2004)
* Cognitive Dimensions Framework (the best place to start is probably http://www.cl.cam.ac.uk/~afb21/publications/BlackwellGreen-C... )
But as others have pointed out, it depends on what kind of complex system you are talking about.