Everybody's daily life consists of problems arising from what you decided yesterday. Managers understand that. Mathematicians want to solve a theorem… - C. West Churchman

For the scientist a model is also a way in which the human though processes can be amplified. This method often takes the form of models that can be programmed into computers. At no point, however, the scientist intend to loose control of the situation because off the computer does some of his thinking for him. The scientist controls the basic assumptions and the computer only derives some of the more complicated implications.

For the goal planner, reality stops at the boundaries of the problem. For the objective- planner, it stops at the boundaries set by feasibility and to some extent by responsibility. For the ideal-planner, there are no "real" boundaries.

It is sheer nonsense to expect that any human being has yet been able to attain such insight into the problems of society that he can really identify the central problems and determine how they should be solved. The systems in which we live are far too complicated as yet for our intellectual powers and technology to understand.