Planning is a fundamental management function and involves deciding what activities need to be done to accomplish goals, when they will be done, how they will be done, and who will do them. There are different types of planning including formal and informal, operational and strategic, and single-use plans like programs, projects, budgets, and strategies. Effective planning helps organizations efficiently achieve objectives and manage resources and uncertainties. Forecasting is an important part of planning as it allows organizations to anticipate future events and conditions.