TMES

Toy medical expert system is build to diagnose three different diseases: Cold, Flu and Brain Tumour. There are three differnet versions of the expert systm. Each of them has its advantage and disadvantages.

Version-1
In Version-1 rules have been defined and user has been allowed to enter any symptom. The major disadvantage with this version is; if any symptom entered by the user and that is found in more than one disease, then this version will list down the names of all those diseases. For example, if we type in headache, it will list down cold and brain tumour.
Another drawback of this version is, if user enters diagnose(X). and press enter it shows only two diseases Cold and Brain_tumour.

Version-2
Version-2 successfully handles three different queries very well and list down them propery, by propely I mean it does not have the disadvantage which version-1 has. Vesion-2 asks user to type in the symptom name, then it searches the syptom along with the disease name and at the end shows the name of the disease. A small disadvantage with this version is, if user enters any sypmtom which is not found in the databse, it will not come up with any result becasue it hasnt found anything similiar in the database.

Version-3
Like Version-2 Version-3 handles all the queries very well, the disadvantages of version-2 have been overcome in this version of TMES>. Slight modification has been made in this version, when it will comeup with any disease name, it will also show the rule number which was used and if user enters any symptom which is not found against any disease, itw ill simply reply "Not Known" because it does not find the symptom in the databse.