The "great debate" in perspective of post-theories clearly sketches out "a picture of non-linear development of IR theory in the future".

Problems creep in, however, when we try to scale this up — that is, when we try to gather all requirements, then do all design, then all development, then all testing in a strictly linear fashion.

This paper discusses the necessity and feasibility of applying linear programming models in the development and utilization of rural energy sources.