Chaining and Explanation in Exsys Corvid

Business Intelligence – Assignment 1 – Knowledge Based System

Daniel Langras –

Willy Sakareza – s1242202

Part 3        : Chaining and Explanation in Exsys Corvid

This case is asking us how to set a recommendation system to choose notebook computer based on customer’s needs. The rules are

        Rule 1

        IF primary task = word processing

        AND primary usage = travel

        THEN weight requirement = light

                Rule 2

                IF primary task = word processing

                AND primary usage = office

                THEN weight requirement = don’t care

        Rule 3

        IF budget <= 12000

        AND budget >= 10000

        AND weight requirement = light

        THEN NB model = IBM X24

                Rule 4

                IF budget < 10000

                AND weight requirement = don’t care

                THEN NB model = Acer 320

[pic 1]

[pic 2]

Figure 1 : Forward and Backward Chaining

Part 4        : Develop a KBS for an Economic Application (Assignment B)

This case is asking us to set a KBS of deduction and addition income calculation based on how people are going to office. There are 4 methods on how people is going to his work place :

1. Take a public transportation to work
2. Take his own transportation to work
3. Take a car from the employer to work
4. Take a car from own office or business

For method A, there are some rules that should be followed:

1. The distance between home and office is more than 10 kilometers for one way trip
2. He should use public transportation at least one day a week and if every day he uses public transportation, the system only calculate 4 days.
3. He should have a public statement from his carrier institution, if there is no public statement on his hand, and then there is no deduction.

Based on rule 1 and 2, there is a table with a variable and specific deduction amount. We assume that he only take one method in going to office and no combination methods. If the distance from his house to the office more than 90 kilometers and he is working only for less than 3 days a week, then the calculation is following this equation “0,23 * (number of day) * (distance) *52” and the maximum allowance permitted is 2036 Euro.

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Figure 2 : Method A