Efficiency alone, however, is not enough to ensure success. Managers must also strive for effectiveness , which is accomplishing tasks that help fulfill organizational objectives such as customer service and satisfaction. Wal-Mart's new computerized scheduling system is an example of efficiency and effectiveness. It typically takes a manager a full day to schedule the weekly shifts for a single store. But the computerized scheduling system calculates the schedules for Wal-Mart's 1.3 million workers in one day. The system also measures trends in store sales and customer traffic so it can have more employees on the job whenever its stores are busy. Tests in 39 stores indicated that 70 percent of customers reported improved checkout times and service using this scheduling system. Wal-Mart spokesperson Sarah Clark said, “The advantages are simple: We will benefit by improving the shopping experience by having the right number of associates to meet our customers’ needs when they shop our stores.”7