Improving Decision Making: Building a Simple Expert System for Retirement Planning Software skills: Spreadsheet formulas and IF function or expert system toolBusiness skills: Benefits eligibility determination 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 retirees 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.