Controlling is forward looking: To be effective, the control should be forward looking. It must focus attention on two things checking current performance and providing early information to achieve results in conformity with standards. Checking the operations should enable prompt detection of faults and of the causes before it is too late for remedy. Deviations, if any, should lead to investigation of the factors responsible and noting the effect on future operations. Remedial action should follow so as to prevent the occurrence of defects thereafter. In other words, control must ensure timely detection of deviations and prevention of their repetition in future.