differentiate between planning and controlling .

Planning is a psychological process of 'thinking and deciding in advance' about 'what is to be done' and how it is to be done. It is a mental activity, in which the manager decides about the goals to be achieved, and actions through which they are to be accomplished. It is futuristic in nature as it involves looking ahead, along with analysing and predicting the future. 

On the other hand, controlling refers to the function of evaluating and assessing the progress of the work done. It involves setting a specific criteria or standards for the work and then comparing the actual work with the set standards. It helps in finding the deviations from the set targets and thereby, take the required corrective actions. It ensures that everything goes as per the plans adopted.