Ebook Beyond lean simulation in practice (2nd edition): Part 2
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Ebook Beyond lean simulation in practice (2nd edition): Part 2
PartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2turing systems, to effectively meet customer requirements in a timely fashion while concurrently meeting operations requirements such as keeping inventory levels low and utilization of equipment and workers high. These strategies incorporate both lean techniques as well as beyond lean modeling and a Ebook Beyond lean simulation in practice (2nd edition): Part 2nalysis.Before presenting the application studies in chapters 10. 11. and 12, inventory control and organization strategies are presented in chapter 9Ebook Beyond lean simulation in practice (2nd edition): Part 2
. These include both traditional and lean strategies.Chapter 10deals with flowing the product at the pull of the customer as implemented in the pull aPartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2 manufacturing operations is illustrated.Chapter 11discusses the cellular manufacturing approach to facility layout A typical manufactunng cell involving semi-automated machines is studied. The assignment of workers to machines is of interest along with a detailed assessment of the movement of worke Ebook Beyond lean simulation in practice (2nd edition): Part 2rs within the cell.Chapter 12shows how flexible machines could be used together for production Flexible machines are programmable and thus can performEbook Beyond lean simulation in practice (2nd edition): Part 2
multiple operations on multiple types of parts. Alternative assignments of operations and part types to machines are compared. The importance of simuPartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2 in the previous part They are designed to be metaphors for actual or typical problems that can be addressed using simulation The applications problems make use of the modeling and experimentation techniques from the corresponding application studies but vary significantly from them. Thus some refle Ebook Beyond lean simulation in practice (2nd edition): Part 2ction is required in accomplishing modeling, experimentation, and analysis. Questions associated with application problems provide guidance in accomplEbook Beyond lean simulation in practice (2nd edition): Part 2
ishing these activities.Chapter 9Inventory Organization and Control91 IntroductionEvon before a full conversion to lean manufacturing, a facility can PartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2site for a conversion to pull. Thus, the organization and control of inventories is the subject of this chapter. Traditional inventor)' models are presented first. Next the lean idea of the control of inventories using kanbans is described. Finally, a generalization of the kanban approach called con Ebook Beyond lean simulation in practice (2nd edition): Part 2stant work in process (CONWIP) is discussed In addition, a basic simulation model for inventories is shown.9.2Traditional Inventory Models2-2J____TradEbook Beyond lean simulation in practice (2nd edition): Part 2
ing oft Number of Setups (Orders) for InventoryConsider the following situation, commonly called the economic order quantity problem. A product is proPartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2units of the product should be produced (or purchased) at a time to minimize the annual cost, assuming that all demand must be satisfied on time? This number of units is called the batch size.The analysis might proceed upon the following lines.1What costs are relevant?a.The production (or purchase) Ebook Beyond lean simulation in practice (2nd edition): Part 2cost of each unit of the product IS sunk, that is the same no matter how many are made at once.b.There is a fixed cost per production run (or purchaseEbook Beyond lean simulation in practice (2nd edition): Part 2
) no matter how many are made.c.There is a cost of holding a unit of product in inventory until It is sold, expressed in $''year. Holding a unit in InPartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2 is an ’interest charge’ on the expense until it Is repaid. This Is the same as the holding cost. Thus, the annual holding cost per unit Is often calculated as the company minimum attractive rate of return times the cost of one unit of the product.2What assumptions are made?a.Production IS Instantan Ebook Beyond lean simulation in practice (2nd edition): Part 2eous This may or may not be a bad assumption. If product IS removed from inventory once per day and the inventory can be replenished by a scheduled prEbook Beyond lean simulation in practice (2nd edition): Part 2
oduction run of length one day every week or two. this assumption is fine. If production runs cannot be precisely scheduled in time due to capacity coPartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2ined from the model questionable.b.Upon completion of production, the product can be placed in inventory for immediate delivery to customers.c.Each production run incurs the same fixed setup cost, regardless of size or competing activities in the production facility.d.There is no competition among p Ebook Beyond lean simulation in practice (2nd edition): Part 2roducts for production resources If the production facility has sufficient capacity this may be a reasonable assumption. If not. production may not ocEbook Beyond lean simulation in practice (2nd edition): Part 2
cur exactly at the time needed.The definitions of all symbols used in the economic order quantity (EOQ) model are given in Table 9-1.45170Table 9-1: DPartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufact Ebook Beyond lean simulation in practice (2nd edition): Part 2n cost per unitFixed cost per batch (A)Cost of setting up to produce or purchase one batchInventory cost per unit per year (h)h = i * c where i is the corporate interest rateBatch size (0)Optimal value computed using the inventory modelOrders per year (F)D/QTime between orders1/F = Q/D Ebook Beyond lean simulation in practice (2nd edition): Part 2PartinLean and Beyond ManufacturingThe application studies in part three illustrate sophisticated strategies for operating systems, typically manufactGọi ngay
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