IENG 423 – Designing Decision Support Systems Sample DSS Analysis.

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Presentation transcript:

IENG 423 – Designing Decision Support Systems Sample DSS Analysis

DSS Analysis DEVELOPMENT OF A DECISION SUPPORT SYSTEM FOR ASSESSMENT OF MOBILE BRIDGES by Vikram Ramamoorthy Masters Thesis in Industrial Engineering West Virginia University 1999

DSS for Mobile Bridges Problem- focused on Armored Vehicle Launched Bridges – AVLB mobile bridges transported on armored vehicles used to transport heavy military equipment (tanks) across rivers and streams in combat zones

DSS for Mobile Bridges from Vikram Ramamoorthy, 1999

DSS for Mobile Bridges Problem: More specifically there was need to have better decision, more informed decisions regarding the maintenance of the mobile bridges and the minimization of mobile bridge failure Bridge failure could mean lost routes for advance or retreat of equipment, loss of tanks, equipment, personnel

DSS for Mobile Bridges Target user not clearly defined in the report context of the report suggests that the users are Army repair technicians and Army repair supervisors both cases highly trained with respect the bridges and their repair

DSS for Mobile Bridges Decisions- in broad terms the decisions were- take no action repair damaged or failing components replace damaged or failing components remove equipment from service due to likely failure decisions made on a component by component basis

DSS for Mobile Bridges DSS Architecture- Included the definition for procedures for the visual inspection of the equipment/components (data collection) Included a database with images to support the visual inspection process

DSS for Mobile Bridges Components – Vehicle data base  Vehicle identification and history, year of manufacture, part number, part number id, number of crossings, etc. Visual inspection database  component by component data on missing, damaged, cracked, or worn parts

DSS for Mobile Bridges Components Vibration/stress test data  sag, crack growth, strain energy, frequency shift On-line maintenance manual

DSS for Mobile Bridges Components Database of component history Knowledge based Expert System  factor available data to predict component of system failure  recommend course of action – decomission Web-base user interface

DSS for Mobile Bridges Performance Addressed issues concerning performance, validity, etc.  Very little attention to actual evaluation of this system

DSS for Mobile Bridges FYI Database developed in MS Access Web frontend used MS Access and MS Personal Web Server Prototype Expert System in VP-Expert Final ES implemented in VBscript