MIS Questions

 
 
 
 
1. Expert systems are information systems which use information about a specific area (usually consisting of highly complex issues) to serve as an expert consultant to users. Typically, expert systems contain a knowledge base and various modules which build on the information supplied by users to arrive at solutions or provide additional information. Decision support systems use decision models and databases to reach a specific decision using a predefined set of rules. An expert system might be used by physicians to help arrive at a diagnosis for a patient whose symptoms are not clearly indicative of any one illness, while a decision support system might be used by a manager to determine whether to buy or lease new equipment. In the first case, the physician would enter the various symptoms based on questions supplied by the expert system. The questions which are asked vary with the answers given, and various diagnoses are ruled out. In the case of the decision support system, the user enters predefined parameters (interest rates, required rate of return, purchase cost and so forth) and the decision support system process the information and renders a decision.

2. Effectiveness is whether or not a particular decision or action achieves the desired result. Efficiency is whether a particular result is achieved with the best use of resources. For example, a data entry clerk who has a stack of invoices to enter into a system is effective if all of the invoices are entere

     
 
 
 
    

 

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