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Hence, lot-sizing models need to reflect the nature of setup drivers and the corresponding hierarchy of setup operations.
Water chemistry setup operations play a significant role at all the stages of commissioning and low power testing.
Most of the current setup reduction methodologies are based on Shingo's Single Minute Exchange of Dies (SMED) that suggests the conversion of internal setup operations to external operations.
In most industrial applications, a few standard types of setup operations suffice to model the sequence-dependent setup effort while in literature mostly an unrealistically wide range of setup times and costs is assumed.
By producing many different types of parts on the same setup, it is expected that there will be significant reductions in the number of setup operations, improved machine tool utilization, and more cost-effective small-batch manufacturing.
Considering an average workload of 75%and90%90 %, respectively, and a capacity loss of 576 h due to setup operations (giving ( X - 576 = 1440 )), determine Y as the effective total workload on the production system: ( Y = 0.75 cdot left( {X - 576} right) = 1080 ) and ( Y = 0.9 cdot left( {X - 576} right) = 1296 ), respectively.
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The flow quantity is enforced to zero if no corresponding setup operation is performed, i.e. ( rho_{ip} = 0 ).
In fact, aggregate demand figures provide additional freedom in creating larger production lots and thus saving one or the other setup operation.
Recent industrial applications are implemented in a modular way, resulting in flexibility during the whole life cycle, i.e., setup, operation, and maintenance.
Typically, a major setup operation is performed before starting or after completing a block, e.g. for retooling or cleaning the manufacturing equipment, while only a minor setup operation is required when changing between products within the same block, e.g. for provision of material or for adjusting the processing conditions.
All models feature an updated easy-to-use graphical user interface (GUI) or On-Screen Display that make the steps of system setup, operation and displaying other important information much easier for the end user.
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