11-10 Expert systems typically use a large number of rules. This project has been simplified to reduce the number of rules, but it will give you experience working with a series of rules to develop an application.

When employees at your company retire, they are given cash bonuses. These cash bonuses are based on the length of employment and the retiree’s age. To receive a bonus, an employee must be at least 50 years of age and have worked for the company for more than five years. The following table summarizes the criteria for determining bonuses.

Using the information provided, build a simple expert system. Find a demonstration copy of an expert system software tool on the Web that you can download. Alternatively, use your spreadsheet software to build the expert system. (If you are using spreadsheet software, we suggest using the IF function so you can see how rules are created.)

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LENGTH OF EMPLOYMENT <5 years 5-10 years 11-15 years 16-20 years 20-25 years BONUS No bonus 20 percent of current annual salary 30 percent of current annual salary 40 percent of current annual salary 50 percent of current annual salary 26 or more years 100 percent of current annual salary