Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 
 Home
 E-mail Us
 Oracle Articles
New Oracle Articles


 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog


 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Analysis
 Design
 Implementation
 Oracle Support


 SQL Tuning
 Security

 Oracle UNIX
 Oracle Linux
 Monitoring
 Remote s
upport
 Remote plans
 Remote
services
 Application Server

 Applications
 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S
upport  
 Development  

 Implementation


 Consulting Staff
 Consulting Prices
 Help Wanted!

 


 Oracle Posters
 Oracle Books

 Oracle Scripts
 Ion
 Excel-DB  

Don Burleson Blog 


 

 

 


 

 

   
 

DSS and Expert Systems

Oracle Tips by Burleson Consulting

High Performance Data Warehousing

Decision Support Systems And Expert Systems  

Decision Support Systems And Data Warehouses

In order to be a DSS, a system must have the following characteristics:

* A nonrecurring problem needs to be solved. DSS technology is used primarily for novel and unique modeling situations that require the user to simulate the behavior of some real-world problem.

* Human input is required. A DSS makes decisions with users, unlike an expert system which makes decisions for users.

* A method is available for testing hypotheses. A true DSS allows the end user to develop models and simulate changes to the model. For example, the end user could ask questions like, “What will happen to my net return if I exchanged my IBM stock for Microsoft stock?” or “How much faster would I be able to service my customers if I add two more checkout registers?”

* Users must have knowledge of the problem being solved. Unlike an expert system that provides the user with answers to well-structured questions, decision support systems require the user to thoroughly understand the problem being solved. For example, a financial decision support system, such as the DSSF product, would require the user to understand the concept of a stock Beta. Beta is the term used to measure the covariance of an individual stock against the behavior of the market as a whole. Without an understanding of the concepts, a user would be unable to effectively use a decision support system.

* Ad hoc data queries are allowed. As users gather information for their decision, they make repeated requests to the online database, with one query answer stimulating another query. Because the purpose of ad hoc query is to allow free-form queries to decision information, response time is critical.

* More than one acceptable answer may be produced. Unlike an expert system, which usually produces a single, finite answer to a problem, a decision support system deals with problems that have a domain or range of acceptable solutions. For example, a user of DSSF may discover that many acceptable stock portfolios match the selection criteria of the user. Another good example is a manager who needs to place production machines onto an empty warehouse floor. The goal would be to maximize the throughput of work in process from raw materials to finished goods. Clearly, she could choose from a number of acceptable ways of placing the machines on the warehouse floor in order to achieve this goal. This is called the state space approach to problem-solving--first a solution domain is specified, then the user works to create models to achieve the desired goal state.

* External data sources are used. For example, a DSS may require classification of customers by Standard Industry Code (SIC) or customer addresses by Standard Metropolitan Statistical Area (SMSA). Many warehouse managers load this external data into the central warehouse.


This is an excerpt from "High Performance Data Warehousing", copyright 1997.

If you like Oracle tuning, you may enjoy the book Oracle Tuning: The Definitive Reference , with over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it directly from the publisher and save 30%, and get instant access to the code depot of Oracle tuning scripts.

 
��  
 
 
Oracle Training at Sea
 
 
 
 
oracle dba poster
 

 
Follow us on Twitter 
 
Oracle performance tuning software 
 
Oracle Linux poster
 
 
 

 

Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


                    









Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


 

Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.