Before revision: Aggregate planning is a marketing activity that does an aggregate plan for the production process, in advance of 6 to 18 months, to give an idea to management as to what quantity of materials and other resources are to be procured and when, so that the total cost of operations of the organization is kept to the minimum over that period.
After revision: Aggregate planning is a pupply chain management activity that produces aggregate plans for the production process, in advance of 6 to 18 months, to give an idea to management