In this work the Purchasing Scheduling Problem (PSP) is presented, based in study cases of public and private sectors. PSP models the purchasing process in both scenarios through an optimization approach. It is based on the multi-objective formulation of the knapsack problem. Therefore, PSP is defined as a based-graph problem with two objectives: maximization of satisfied demands and minimizati...

The most important advantage of an economic order quantity (EOQ) system is its ability to handle the unexpected demand. A model for comparing the inventory costs of purchasing under the EOQ system and the just-in-time (JIT) order purchasing system in existing literature concluded that JIT purchasing was virtually always the preferable inventory ordering system. By expanding the classical EOQ mo...

Bipartisan interest is growing in Congress for using federal tax credits to help low-income families buy health insurance. Regardless of the approach taken, tax credit policies must address risk selection issues to ensure coverage for the chronically ill. Proposals that link tax credits to purchasing pools would avoid risk selection by grouping risks similar to the way large employers do. Volun...

BACKGROUND Hospital purchasing alliances are voluntary consortia of hospitals that aggregate their contractual purchases of supplies from manufacturers. Purchasing groups thus represent pooling alliances rather than trading alliances (e.g., joint ventures). Pooling alliances have been discussed in the health care management literature for years but have never received much empirical investigati...