Value chain analysis identifies a firm's primary and support activities that add value to its products or services. The value chain depicts the internal activities involved in transforming inputs into outputs. It contains primary activities like inbound logistics, operations, outbound logistics, marketing and sales, and service, as well as support activities like procurement, technology development, human resource management, and firm infrastructure. Conducting a value chain analysis allows a firm to examine how each activity contributes to relative costs or customer willingness to pay to identify sources of competitive advantage.