Question

1. Draw the decision tables for all the problems below
2. For the decision tables above, reduce the tables if possible.

Problems

1. A month is to be represented as an integer. A valid month is in the range of 1..12. An integer < 1 is invalid, or an integer > 12 is invalid. Consider how this can be simplified or reduced.
2. An employee is either hourly or salaried. An hourly employee is paid by calculating an hourly wage and an hourly employee that works more than 40 hours is paid overtime. An hourly employee that works less than 40 hours must produce an absence report. A salaried employee can work any number of hours.
3. A new program to determine parking rates is to be developed. Users will select (from a dropdown) the classification of the vehicle owner (faculty/staff or student), the location of the parking (garage or open lot) and the type of vehicle (large or small).  Students with a small vehicle pay $250.00 in a lot and $350.00 in a garage.  Students with a large vehicle may park in a lot for $400.00.  Faculty/staff may park small vehicles anywhere for $150.00 and large vehicles in a lot for $200.00.  Large vehicles are not allowed in the garage.

Answer 1

WHAT IS DECISION TABLE? ? ?

A Decision table is a table of rows and columns, separated into four quadrants and is designed to illustrate complex decision rules.

• Condition Stub – upper left quadrant
• Rules Stub – upper right quadrant
• Action Stub – bottom left quadrant
• Entries Stub - bottom right quadran

Standard format used for presenting decision tables is as shown below.

Importance of Decision Tables

• Aids in the analysis of structured decisions
• Ensures completeness
• Checks for possible errors (impossible situations, contradictions, and redundancies, etc.)
• Reduces the amount of condition testing that must be done

How To Develope A Decision Table? ? ?

• Process requires the determination of the number of conditions (inputs) that affect the decision.
• The set of possible actions (outputs) must likewise be determined
• The number of rules is computed
• Each rule must specify one or more actions

Number of Rules

• Each condition generally has two possible alternatives (outcomes): Yes or No
• In more advanced tables, multiple outcomes for each condition are permitted
• The total number of rules is equal to 2 no. of condi ti ons
• Thus, if there are four conditions, therewill be sixteen possible rules

Decision Table For:-

1. A month is to be represented as an integer. A valid month is in the range of 1..12. An integer < 1 is invalid, or an integer > 12 is invalid. Consider how this can be simplified or reduced.

Let's have a look at how to create a decision table for the above question and how to reduce the table format. here the step by step process is shown with the help of tabular method.

  

  

The result obtained in the step-8 is the final decision table obtained for the above question.

Decision Table For :-

2. An employee is either hourly or salaried. An hourly employee is paid by calculating an hourly wage and an hourly employee that works more than 40 hours is paid overtime. An hourly employee that works less than 40 hours must produce an absence report. A salaried employee can work any number of hours.