(1) Cycle view - In which the processes in a supply chain are divided into a series of cycles, each performed at the interface between two successive stages of a supply chain.(2)Push/Pull view - In which the processes in a supply chain are divided into two categories depending on whether they are executed in response to a customer order or in anticipation of customer orders. Pull processes are initiated by a customer order, whereas push processes are initiated and performed in anticipation of customer orders.