This feeds the training pipeline, and creates a customer for life. Consider creating a curriculum for each job title. Assign necessary courses to the curriculum and look for ways to enroll students into a curriculum automatically, based on their job titles. Some courses must be taken repeatedly. Many medical and safety courses are taken periodically as refresher courses.
Some skills are too important to be taken for granted.
Depending on your industry, the government may mandate refresher courses. Sometimes your company will. Other courses update employees on the latest trends or products. These are dynamic courses that change constantly. Turning to the supply side of economics, if the price for a product is too low, suppliers will not want to produce it.