Constructing fuzzy inference rules
Rules are constructed in the term of conditional if-then
statements as shown in Figure 3. Here, the rules are created
based on experts’ knowledge and literature review. For
example, there are 12 rules of the total of 523 rules shown
below. The rules can be adjusted based on the suitability of
a particular purchasing policy and deal with the enterprise
circumstances. These rules are as follows:
a. Fuzzy module costs
- If Capital Expenditures are Low and Operating
Expenditures are Medium Then Costs are Moderatly
Low
- If Capital Expenditures are Medium and Operating
Expenditures are High Then Costs are Moderatly High
- If Capital Expenditures are Very High and Operating
Expenditures are Medium Then Costs are High
b. Fuzzy module functionality
- If Document Management is Poor and Communication
is Poor and Measurement is Poor and Workflow
Management is Poor and Scalability is Difficult and
Security is Poor Then Functionality is Poorest
- If Document Management is Poor and Communication
is Poor and Measurement is High and Workflow
Management is Average and Scalability is Easy and
Security is Good Then Functionality is Moderatly Poor
- If Document Management is Poor and Communication
is Poor and Measurement is High and Workflow
Management is Good and Scalability is Easy and
Security is Average Then Functionality is Average