Ronald E. Giachetti

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Direct implementation of extended arithmetic operators on fuzzy numbers is computationally complex. Implementation of the extension principle is equivalent to solving a nonlinear programming problem. To overcome this difficulty many applications limit the membership functions to certain shapes, usually either triangular fuzzy numbers (TFN) or trapezoidal(More)
Healthcare facilities, especially hospitals, are under financial pressure to control cost. One element that affects cost significantly is staff. We have developed a tool that integrates a simulation model and an integer linear program (ILP). The simulation model establishes the staffing requirements for each period, and the ILP produces an optimal calendar(More)
This paper presents the preliminary results of an ongoing research project investigating the patient appointment scheduling for an outpatient clinic. The outpatient clinic was experiencing three problems of long patient throughput times, a large backlog of appointments, and a high no-show rate. We believe a new scheduling approach called Open Access could(More)
The material and manufacturing process selection problem is a multi-attribute decision making problem. These decisions are made during the preliminary design stages in an environment characterized by imprecise and uncertain requirements, parameters, and relationships. Material and process selection decisions must occur before design for manufacturing can(More)
Manufacturing enterprises are being forced into greater collaboration with customers and suppliers in order to produce quality products in smaller batches, shorter lead times, and with greater variety. Consequently, the design-for-manufacturing task must be conducted in these virtual and distributed enterprises across traditional organizational boundaries.(More)
Engineering design is characterized by a high level of imprecision, vague parameters, and ill-defined relationships. In design, imprecision reduction must occur to arrive at a final product specification. Few design systems exist for adequately representing design imprecision, and formally reducing it to precise values. Fuzzy set theory has considerable(More)
The technology help desk function has grown in importance as information technology has proliferated throughout the organization. The primary objective of the help desk is to resolve problems related to IT in the organization. As such, the agents in the help desk must be very knowledgeable of the information systems, applications, and technologies(More)
Interdependence between the subsystems of an enterprise is one of the driving reasons for integrating the enterprise. Integration attempts to manage those interdependencies so all subsystems work harmoniously together to achieve the enterprise goals. Prior to embarking on an enterprise integration project the interdependencies need to be analyzed.(More)