You manage the human resources department for a mid-sized retailer. Part of the operations consists of a call center with 100 employees spread over three shifts operating 24 hours a day, seven days a week. There is a main group with 20 people reporting to a shift supervisor on the main daytime shift from 8 a.m. to 4 p.m. There are regularly scheduled times for breaks and lunch. Recently senior management reported to you that they were concerned regarding tardiness of some employees. While the customer relationship management reports signal that there are no service issues, senior managers are concerned that they are overstaffed. You feel that the daytime shift is the most experienced group, and you do not want to lose some of the best employees through termination. You also do not have any budget money to use for incentive payments aimed at reducing tardiness. What ideas from operant conditioning, behavior modification, and social learning theory would you use to reduce the problems of tardiness?