11+Factory_Physics

11+Factory_Physics - FactoryPhysics FactoryPhysics...

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Factory Physics Factory Physics
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Definition Definition The term  factory physics   denotes those manufacturing  relationships that can be described mathematically, much  as the term physics refer to physical relationships that  can be framed in mathematical terms.
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Other Definitions Other Definitions Workstation : Collection of one or more machines or workers  performing identical functions. Raw Material : parts purchased from outside. Components : individual pieces that are assembled into more  complex products. Subassemblies : assembly of several components. End items : a part that is directly sold to the customer.
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Other Definitions Other Definitions Bill of Materials : list of parts that go into a product. Consumables : items used in production but are not part of a  product. Routing:  description of the sequence of workstations passed  through by a part. Orders : request from a customer for a particular part number. Purchase order : a collection of one or more orders.
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Other Definitions Other Definitions Jobs : a set of physical materials that traverse routings together  with the logical information. Throughput (TH ):  the average output of a production process. Capacity of a station : upper limit in its throughput. Crib inventory : intermediate inventory location usually at the end  of a routing. Finished goods inventory : place where the end items are held  prior to shipping.
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Other Definitions Other Definitions Work in process (WIP) : the inventory between the start and the  end points of a production routing. All the products between, but  not including the stock points. Cycle time (CT):  average time from release of a job at the  beginning of a routing to until it reaches an inventory point at the  end of the routing. I.e., the time the part spends as WIP. It is more  difficult to define this for the entire product.
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Other Definitions Other Definitions Lead time:  time allotted for production of a part on the  routing. Service level:  P{cycle time <= lead time) Fill rate : fraction of orders that are filled from stock. Bottleneck rate (r b )  = rate of the process center with the  least long term capacity.
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Other Definitions Raw process time (T 0 )  = sum of the long-term average process  times of each workstation in the line. Congestion coefficient ( α ):  a dimensionless coefficient that  measures congestion in the line . Critical WIP level W
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11+Factory_Physics - FactoryPhysics FactoryPhysics...

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