The value chain model is done by a company in certain industries in order to provide a product or service. The way that they provide these products or services is done through activities. There are primary activities, support activities and physical, virtual and combined value chain.
The primary activities include inbound logistics, operations, outbound logistics, marking and sales and service. These seem like common activities found in a business. The inbound logistics include the movement of the parts or supplies around to end with the final product.
The outbound logistics includes making the product complete. The support activities include infrastructure, technological development, human resources management, procurement. Sometimes, a company may have to buy raw materials in order to make their final product and this activity would fall under procurement.