From: rjones@colby.edu   
      
   Xeus wrote:   
   > i am a final year student and wokring on a project " Computer Aided   
   > Motor Car Diagnosis System. Its            core functionality as   
   > according to its name is to assist automobile mechanics in checking   
   > out major disorders that are likely to occur in engines of cars. It   
   > will be an expert system which will provide help to auto mechanics.   
   > What i am asking is what are the testing Phases of Expert system? are   
   > they similar to what other software Testing ? like correctness testing   
   > , integrity testing , usability testing or they differ from it? and i   
   > want a suggestion on what what methodology should i use? like water   
   > fall method? and stuff?   
      
   You may get different answer to this, but I'd say yes, and expert system   
   is (probably a large) software system that should follow standard   
   software engineering principles and phases.  If you are building an   
   expert system, I'd assume that somewhere in your process you are doing   
   knowledge acquisition from one or more subject-matter experts.  This may   
   be the key distinguishing factor from a "normal" software engineering   
   project.  You will want to involve the user in your testing cycles, so   
   that you are not just testing "external behavior", but making sure the   
   reasoning processes make sense to the SME (meaning you also hopefully   
   have some way to present the reasoning processes to the SME in a   
   comprehensible form).  In expert systems I have been in on, we followed   
   a spiral model, so we could get a small piece of the system initially   
   working and then incrementally add knowledge/capabilities.  But I   
   imagine other SE approaches would work well, too.   
      
   Randy Jones   
      
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