Because the value stream map looks at the creation of value in an entirely different way, it offers a striking view of how disconnected operations can be and how riddled with waste they are by design.
Going Lean describes the reason for this: The traditional emphasis on optimizing factories for turning out huge batches of identical items at a narrow, anticipated rate of demand drives the adoption of supersized equipment to create large economies of scale and with it a focus on keeping people and equipment operating efficiently, without regard to the tremendous waste that comes with this