Planning and forecasting are important managerial principles whose function helps enhance the business. Planning is a process of drafting plans of what will be done in the future while forecasting is estimating, predicting, or projecting the future—forecasting deals with uncertainty using facts, past trends, economic conditions, and information while planning involves having relevant information and using the information to draft a plan.
Planning is assessing how the future will be while forecasting is estimating events or trends. Forecasting dwells mainly on facts while planning dwell on facts and expectations. Planning has to do with how, when, and what to be done.
Planning includes operational planning, strategic planning, and tactical planning while we have the qualitative and quantitative forecasting, judgmental forecasting, time series forecasting, and naïve forecasting. Planning is done by the top managers, while forecasting is done by experts.