Constructing a Decision Table
PART 1. FRAME THE PROBLEM.
Identify the conditions (decision criteria). These are the factors that will influence the decision.
E.g., We want to know the total cost of a student’s tuition. What factors are important?
Identify the range of values for each condition or criteria.
E.g. What are they for each factor identified above?
Identify all possible actions that can occur.
E.g. What types of calculations would be necessary?
PART 2. CREATE THE TABLE.
Create a table with 4 quadrants.
Put the conditions in the upper left quadrant. One row per condition.
Put the actions in the lower left quadrant. One row per action.
List all possible rules.
Alternate values for first condition. Repeat for all values of second condition. Keep repeating this process for all conditions.
Put the rules in the upper right quadrant.
Enter actions for each rule
In the lower right quadrant, determine what, if any, appropriate actions should be taken for each rule.
Reduce table as necessary.