ABSTRACT
The phases are quite sharply differentiated in practical problems. The work of investigating and solving the practical problem, will necessarily be done within the framework of that ideology in whose objects the problem is conceived and first assessed. The work of solving practical problems also suffers from the inevitable absence of a consensus on the criteria by which quality or success is judged. The sphere of activity comprised in the solution of practical problems is so vast and complex, that its proper study requires, and has already created, an extensive research effort. The framing and solution of practical problems is at risk of encountering a multiplicity of pitfalls, so that the purposes served can turn out to be quite different from those intended. The operation of overall control over the phase of execution then constitutes a new practical problem in itself, with its distinct phases of investigation; and the neglect of this will put the whole practical project in jeopardy.
