A concept that is used a lot in design research, but what is it?
“If you want to design intervention X [for the purpose/function Y in context Z], then you are best advised to give that intervention the characteristics A, B, and C [substantive emphasis], and to do that via procedures K, L, and M [procedural emphasis], because of arguments P, Q, and R.” (Van den Akker, 1999, p. 9)
Van den Akker, J. (1999). Principles and methods of development research. In Design approaches and tools in education and training (pp. 1-14). Springer.