Visual Stream Mapping Essay
Lean manufacturing is a production practice that considers the expenditure of resources for any goal other than the creation of value for the end customer to be wasteful, and thus a target for elimination. Working from the perspective of the customer who consumes a product or service, "value" is defined as any action or process that a customer would be willing to pay for. The goal of Lean is to becomes the creation and maintenance of a production system which runs repetitively, day after day, week after week in a manner identical to the previous time period. Lean is actually the set of "tools" that assist in the identification and steady elimination of waste. As waste is eliminated quality …show more content…
Motion is a waste associated with both operators and equipment. In the case of operators, wasted motion includes bending, walking to get or place parts, lifting, and taking more than one step to reach or view machine interfaces. Motion can add significantly to cycle time, and must therefore be considered separately when creating and balancing cells and focused factories.
Scrap and rework are obviously wasteful. In batch production, scrap is rarely visible, since there is always more material available, and the run can be extended for a short while to produce the required quantity. In a continuous flow system, scrap is a serious problem, since every machine loses a cycle when a piece is rejected. This destroys balance, and when producing to customer takt, results in a missed shipment.
Waiting takes a number of forms. Operators wait for machines to complete their cycle, or for material to arrive so they can work on it. Machines wait for work, and also for operators to load and unload work pieces or other production material. The kinds of waiting that are common in batch production facilities are different from the waiting that is wasteful in a continuous flow system.
1.3 Characteristics of VSM
This is an elements that need an