Modeling a multiprocessor system with preemptive priorities
Article Abstract:
Two methods for modeling a system with a number of processors and two job types, one of which has preemptive priority over the other, are presented. The system is characterized by Poisson arrivals and exponential service times. One method has attractive structural characteristics and a rate matrix that can be solved easily, but the group of equations at the boundary is usually extremely large. The other method has a rate matrix that is not solved easily, but it provides an efficient solution at the boundary and offers a basis for waiting-time evaluation for jobs with low priority. An efficient implementation of state reduction for the solution of the stationary probabilities related to the boundary states is presented, along with a numerical example.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1991
User Contributions:
Comment about this article or add new information about this topic:
Metagraphs in hierarchical modeling
Article Abstract:
A decision support system (DSS) that contains a large model base can pose problems to DSS users. The process of choosing particular models to be used for specific tasks may prove to be difficult. This problem can be eliminated through the use of a graph theoretic structure called a metagraph. Metagraphs allow DSS users to develop and maintain model base views. A view, which is defined as an abstraction of the model base that controls attention to relationships between certain variables, permits a more effective and simplified use of the system. Metagraphs also identify conditions under which views can be combined safely.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Middle management downsizing: an empirical investigation of the impact of information technology. The substitution of information technology for other factors of production: a firm level analysis
- Abstracts: Rolling Horizon Procedures for the Facilities in Series Inventory Model with Nested Schedules. A Multi-Item Maintenance Center Inventory Model for Low- Demand Reparable Items
- Abstracts: Marketing Planning: A Mandatory Process for Company Survival - Part 5. Market Planning
- Abstracts: The Recruiting, Training, and Professional Involvement of Tax Personnel of Large Corporations
- Abstracts: Clarity of Manager Roles and Performance of R&D Multidisciplinary Projects in Matrix Structures. part 2 Controlling new product R&D projects