Normal gating service with flexible capacity

Normal gating service with flexible capacity 

In a situation with normal gating service and strict capacity, clients do not quite know when they have to order their products. Sometimes their order will be delivered during the next production cycle, but it may also take several cycles before they will be delivered. If it happens rather frequently that an order will not be delivered during the next production cycle, the clients may become dissatisfied and they may prefer another supplier. The supplying firm can avoid this kind of situation and guarantee, for instance, that all orders will be delivered no later than after the first complete 

In later chaptos, we will also consid the possibility of doing extra work in combination with a non-cyclic production rule. In those situations we will assume that the available capacity is the same constant for every production interval. This means that the capacity set C takes the form (c,c.c). Therefore we wiU use die same form for the capacity set in this situation with normal gating service with flexible capacity. In this situation we also consider different forms for the set S, such that some types occur more than once diuing a production cycle. The most obvious choice for the set S in the situation with a fixed length for the production interval is the choice in which the frequency in which a type occurs in a production cycle is linear to the demand for that type. We can use this kind of choice if we want to minimise the costs of set-ups, ov me and the delivery times. 

Assuming that the delivery time of an order is expressed in an integer number of periods, so it may take the values l,2.max(Ri,n2.n3), the average delivery time for 

Of course there may be situations which are more complicated than this example, but as long as it is possible to produce all the demand that is present at the beginning of the production interval, if necessary by doing extra work, the analysis will only be as difficult as in this example. The situations with the fixed production cycle we have considered in this chapter are on the one hand illustrations of cyclic production rules, which seem to us both useful and interesting to analyse, because cyclic rules are often used in practical situations and on the other hand they can serve very well as some kind of measure for the comparison of non-cyclic production rules in the following chapters. 

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Normal gating service with flexible capacity... 

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