Shelley led the service team Shelley led the service team responsible for the "customer experience" at a major fast-food restaurant chain. She wanted to give guidance to the company's franchisees about their staffing. Her big insight came from the 100 or more stores she had recently visited. Stores with at least half of their employees working a full eight-hour shift, as opposed to the more common four-hour shift, performed significantly better. The employees who worked full shifts were more experienced and earned $18/hour, while the employees who worked partial shifts earned $12/hour. To sell the store owners on her idea, Shelley decided to build a model to minimize the total cost of hourly labor. She planned to build her model around the typical level of staffing needed by hour (Table 1). She was interested in the effect a new "experienced staff" constraint would have.responsible for the "customer experience" at a major fast-food restaurant chain. She wanted to give guidance to the company's franchisees about their staffing