Conditions necessary in a control cycle

There are four necessary conditions that must be satisfied before any system can be said to be controlled. Such are as follows:

(1) Objective of the process being controlled must exist

(2) The output of the procedure should be measurable in terms of the dimensions defined by the objective.

(3) A predictive model of the process being controlled is required so that causes for the non-attainment of objective can be identified and proposed corrective action analyzed.

(4) There should be potential of taking action therefore deviation of attainment from objective can be reduced.