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【正文】 shop stocks, so is selfmanaging PROS ? Must carry inventory for all ponent parts and all variants in shop stocks ? Can hide long and unstable production lead times CONS Pull Process A T Process B T T T Dispatch Area Levelling Board Production control Sequence List Sequential Pull ? Parts are built to order: Customer leadtime must exceed production leadtime ? Production is triggered at the point at which the variant is defined, via a sequence list ? Tablet kanban is used to authorise production or withdrawal, but does not specify variant ? FIFO principles must be used to ensure production sequence equals demand sequence Pull Customer Sequential Pull ? Promotes a short amp。 Copyright McKinsey amp。CONFIDENTIAL This report is solely for the use of client personnel. No part of it may be circulated, quoted, or reproduced for distribution outside the client anisation without prior written approval from McKinsey amp。 it is not a plete record of the discussion. date Just in Time client name 169。 stable production lead time ? Minimises finished goods inventory safety stock is not required ? Shelf life is not a problem ? Strong incentive for being ‘Lean’ PROS ? Customer lead time must be longer than production leadtime ? Less flexible to changes in customer volume requirement after ordering ? Number of units transferred between processes must be constant for smooth flow ? Start up after full shutdowns can be plicated to manage CONS Pull Mixed Pull Process A Process B Dispatch Area Customer T T T T Production control Sequence List PI PI PW PW Levelling Board ? Sequential and Fill Up are used in conjunction to produce parts on the same line ? High frequency items are stocked (Fillup) ? Low frequency items are built to order (Sequential) ? Build to order items must have a production lead time shorter than customer order time Pull Mixed Pull ? Benefits of each system apply as appropriate to each stream ? Enables flexibility to match pull method to product demand patterns PROS ? Production lead time fluctuates and so customer lead time fluctuates too ? System harder to manage than pure sequential or fillup pull ? Harder to identify problems ? Difficult to balance work effectively CONS Pull Levelled Production The correct function of Just in Time depends on levelled production: Continuous Flow Processing P F C Levelled production Takt time Pull syst
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