Decision Support System Course Dr. Aref Rashad Part:5 Car Purchasing DSS Example February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Goal of Car Purchasing DSS To provide support for users from a broad range of experiences and expertise. There is a wide range of data that could be requested in support of the automobile purchasing decision. Different people will approach the problem differently after some experience. Given individuals with a given level of experience may approach the problem differently if the system can provide guidance as to how to use the information. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Data Component DSS must contain comprehensive information, not only about current models, but also about the history associated with the manufacturer and model. The user may have a need to look at trends with regard to a particular model and its maintenance record February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Historic Background Information: New Automobiles
Historic Background Information: New Automobiles
Historic Background Information Targeted Category of Automobile
Automobile Attributes in Kiplinger’s Buyer’s Guide to New Cars • Manufacturer • Model • Body Style • Suggested Retail Price • Dealer Cost • Resale Value in 2 and 4 years • Insurance Cost Index • Engine Size • Number of Cylinders • Miles Per Gallon in the City and on the Highway • Curb Weight • Wheelbase • Length and Width • Turning Circle (feet) • Legroom in the front and rear • Headroom in the front and rear • Cargo space • Antilock brakes status/cost • Automatic Transmission status/cost • Air Conditioner cost
Edmund’s Web-Based Information Service
Edmund’s Car Review February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Information Uses Consider Rationality aspects Consider Images Try Virtual Reality Video Clips Audio Clips February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Rationality Aspects: Economic rationality Costs of the various automobiles Technical rationality Engine size, Horsepower, Better grade wheels and tires Legal Rationality Car seats Societal rationality air or noise pollution Procedural rationality Fare away Service center, Rare unique type of fuel Political issues car purchased for an elected official February 2013 Decision Support Systems Course
Annual Automobile Cost Worksheet
Data Requirements Data must be current. New car buyers will want information about the newest features and problems. Recall notices and identified problems may also provide critical information to a user. The system should present the user with basic, standard information and allow him or her to drill as deeply as desired and to compare automobiles with regard to factors that are of importance to that user. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Data Requirements Use electronic field definition dictionary, particularly for first-time users. This dictionary used to: Define technical terms such as EFI, MPGH, MPGC Define scale for collision and insurance ratings Concepts such as a car through a broker or standard lease terms. Explanations to more technical questions such as why they would care how many valves are available in the car or the difference between a single and dual overhead cam. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Data Component Development The creation of a database can be done relatively straightforwardly using one of the standard database management systems, such as Oracle or MySQL. Accessing external data requires the use of a tool - Cold Fusion - that will allow the Web-based interface to connect with the behind-the-scenes database A database generally has multiple tables associated with it. Each table stores information about multiple attributes of multiple cars. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Example Relation (Table) for New Cars
Model Component A careful consideration of models for the DSS could result in a system that allows users to make truly informed decisions. Models should provide support for all phases of decision making, from the initial generation of alternatives to the final questions of how to finance. Model management component should include assistance in the appropriate use of models and intelligence that reviews model use for errors. Model management system should implement heuristics to automate choices where decision makers cannot or do not implement choices. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Brainstorming and Alternative Generation One important model management operation is to help users generate alternatives. At the simplest level, alternative generation could include searching for options that meet some criterion specified by the user the goal is to summarize and guide while still allowing a great deal of flexibility. One possibility is to categorize criteria and ask users first to specify the category of criteria that they want to emphasize. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Assistance for Defining Criteria February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Finer Detailed Definition of Criteria February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Evaluating Alternatives As decision makers consider various automobiles, they compare the benefits and costs associated with owning each of them. How they compare them depends upon the criteria selected. February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Content-Dependent Assistance of Criteria Selection February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Support for Criteria Definition February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Intelligent Support in a DSS February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Support for Multi Criterion Choices February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Specifying Criteria February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Results from Analysis February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Consumer Reports February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Better Understanding Choices February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Decision Support Results February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Historical Information to Facilitate Support February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Support for Users Exploring Assumptions February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Interface Component February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
February 2013 Decision Support Systems Course .. Dr. Aref Rashad
Initial Screens from Commercial Automobile Purchasing System
Initial Screens from Commercial Automobile Purchasing System
Three Methods by Which Users can Enter Data in the System
Three Methods by Which Users can Enter Data in the System
Three Methods by Which Users can Enter Data in the System
Change in Menu After Other Selections