Kind of like a ship’s wheel that has a linkage connecting it to the rudder and that linkage is broken. Without this business process there becomes a disconnect between the desired outcome and the actual outcome. Sales & Operations Planning is the primary linkage that connects the strategic plan to the tactical plan. The common relationship of these four fundamentals are represented in the below diagram. Mix usually includes things like specific products, items or customer orders more of a detail view of the business. Mix is more often stated in units but can be dollarized when needed. Mix refers to the question of “Which Ones”. Volume typically deals with aggregate rates of sales & production more of a big picture view of the business. Volume is usually stated in units and dollars and includes groupings such as product families, customer orders, production resources and so on. Volume refers to the question of “How Much”. Supply is categorized into three main groups identified as inventory, capacity and lead-time. Supply is commonly expressed as the resources used to fulfill demand like materials, manpower, machinery, capacity, storage space, time, money and so on. Demand is categorized into two groups referred to as dependent demand and independent demand.
Demand is commonly expressed as customer orders, sales forecasts, interplant transfers, DC transfers and so on. The primary function of a Master Scheduler is to balance demand and supply at the aggregate volume level with that at the detail mix level. The four fundamentals of Master Scheduling are demand, supply, volume and mix.
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