An extended EMQ model for a failure prone machine with general lifetime distribution

Article Abstract:

An economic quantity model for failure prone machines with general lifetime distribution has been developed using the framework designed by H. Groenevelt and his partners. The model works by assuming that the rate of interval between failures is generally distributed and that the machine is instantaneously repaired after the failure. Through the analysis, it was established that the behaviour of the model and the optimal lot size are both affected by the type of failure rate function. Further, the model presents an evidence for the uniqueness of the optimal lot size and the negligible effect of time to the repair rate.

Metalworking Machinery, Machine Tools, Metalworking Machinery Manufacturing, Analysis, Machinery, Manufacturing processes, Manufacturing, Maintenance and repair, Machine-tools, Economic lot size

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Studies on the optimal location of commerce - basic laws considering the distribution of population

Article Abstract:

A mathematical model employing a simplified one-dimensional distribution of population to maximize the total volume of demand for a new convenience store is developed to determine the optimal point of location for the newly opening store. The volume of demand is hinged on the population at each location and the suction force, which is based on the maximum migration length and the distance from the store to customers. The optimal location is derived under the variation of population models and in accordance with the length of the planning area and the maximum migration length.

Retail Stores, Location, Stores, Industrial locations, Industrial location, Store location

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Distribution planning for a divergent N-echelon network without intermediate stocks under service restrictions

Article Abstract:

An inventory management policy for multi-echelon distribution networks without lot size or capacity restrictions is considered. Specifically, a periodic review control policy for networks which hold stock at the final stockpoints is presented. Likewise, an approximation procedure for deriving the ordering and allocation parameters that meet target service levels in the final stockpoints is also discussed.

Management, Planning, Distribution of goods, Distribution (Commerce), Logistics, Business logistics, Inventory control, Distribution channels

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