assistants capable of operating them. Part of the advantage of group practice and other organization modifications lies in their mak-ing possible more efficient use of assistants. THE PRECEDING PRESENTATION h a s p o i n t e d out the fact of a growing shortage of physician services and has given us a

We address a multi-item capacitated lot-sizing problem with setup times and shortage costs that arises in real-world production planning problems. Demand cannot be backlogged, but can be totally or partially lost. The problem can be modelled as a mixed integer program and it is NP

Abstract. This paper discusses the problem that hospital managers face several times a day in response to the demand for nursing services. Prior to the start of each shift, the number of nurses who are scheduled to be on duty over the next 24 hours is compared with the number actually available

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, is presented to solve the above deterministic EOQ/EPQ models with/without shortages. To widen the application of this approach, this paper considers the variable lead-time EPQ model with shortages. We show that the aforementioned approach can be applied to solve not only the deterministic case but also

Uncertain demand combined with a positive lead time for adding capacity creates the risk of capacity shortage during the lead time. Accurate shortage estimation is very important to determine a capacity expansion policy. In this paper, we investigate four kinds of option pricing methods to estimate

This paper formulates a multi-level supply chain network with a single producer, multi distributors and multi retailers during a finite planning horizon. The demand rate is assumed to be exponential function of time; shortages are allowed and completely backlogged. The stock is assumed to undergo

This paper deals with in developing an inventory model with time-dependent Weibull demand rate where shortages are allowed. Here we have considered shortages are completely backlogged. The production rate is assumed to be finite and proportional to the demand rate. The analytical solution

management level executives. Group B consists of top management level executives. Group A is exposed to cumulative shortage process and shortage process of group B has varying shortage rates. Recruitment is done to fill all the shortages of the two groups. We find the expected time to recruit and recruitment

Abstract: A continuous production control inventory model for deteriorating items with shortages is developed. A number of structural properties of the inventory system are studied analytically. The formulae for the optimal average system cost, stock level, backlog level and production cycle time