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Lead time batches

When choosing between different types of reactors, both continuous and batch reactors were considered from the point of view of the performance of the reactor (continuous plug-flow and ideal batch being equivalent in terms of residence time). If a batch reactor is chosen, it will often lead to a choice of separator for the reactor effluent that also operates in batch mode, although this is not always the case as intermediate storage can be used to overcome the variations with time. Batch separations will be dealt with in Chapter 14. [Pg.143]

The lead time, for incorporation of enzymes as an adjunct in whatever form into commercial food processes, appears to be far longer than equivalent innovation lead times m non-food, or even pharmaceutical processes. The exception to this finding is that there are enzymes which play an important role in many analytical and quality control procedures in the food industry, without the use of which, for batch or continuous process monitoring, many product lines would not be possible. [Pg.68]

In the past, major new chemicals have often had R D lead times of seven to ten years. In such cases, some aspects of newly instituted environmental assessments (e.g. a portion of the time required for long-term chronic toxicity tests) can be conducted in parallel with other R D activities. In other cases such as batch-lot production activities, new test requirements simply extend the R D cycle for the length of the test program. [Pg.183]

The simple Poisson demand arrival process assumed here can be readily extended to more involved processes, such as those that involve batches, like the model in Ettl et al. (2000), which makes use of the queueing results in Liu et al. (1990). The same applies to more general lead time distributions and multiple servers approximate queueing models can be adapted refer to Buzacott and Shanthikumar (1993). [Pg.1691]

Lead Time in a Manufacturing System with Order Batches... [Pg.81]

Notice that in this example, adjustments in capacity impacted both the lead time at the manufacturer as well as the consequent buffer inventory at the retailer. In addition, changing the capacity configuration and lowering the set-up time also decreased the incentive to batch as well as the system inventory and lead time. [Pg.84]

Evolution to a demand-driven supply chain will likely proceed in the order proposed above. Shortening the lead-time is fundamental to changing batch model economics. Basing decisions on demand comes after adopting the economics of the flow model. Along the path, there is feedback to earlier steps. For each phase in Fig. 2.6 above there are three to four methodologies to be applied towards a DDSC operation. [Pg.16]

Functional design - It is the traditional approach and it has its foundation in traditional accounting mentality and the associated batch approach to production. In a functional setup, the work must progress sequentially through each unit. Because the batch model stresses worker and machine utilization while ignoring lead-time, the functional design is a natural response despite not so obvious penalties in terms of lead-time. [Pg.74]

Velocity refers to the percent of time spent in value-added operations. Low velocities are characteristic of high waits for processing — usually in a batch. By this measure, many operations have velocities of I or 2 percent. This means there are only a few minutes of value-adding time in a total process lead-time of days or weeks or months. ... [Pg.361]

Large batch sizes, long lead times, and large storage areas... [Pg.101]

Costs at various stages of the product development life cycle Lead time in product development Batch and lot sizing Process redesign Product development strategies Procurement and/or allocation of resources Strategic, tactical, and operational policies for the supply chain... [Pg.29]

The challenge is also very small batch size, which might require frequent setups. Customer requirements might differ for reprocessing of particular components. Returns with different quality levels have different lead times, costs, and capacity usage. [Pg.244]


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See also in sourсe #XX -- [ Pg.81 , Pg.84 ]




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Batch time

Lead times

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