As of September 2012 there were some issues with Sam's Club transitioning from a manually-inputed schedule to an automated computer scheduling system based around customer's needs. The computer system would completely fail to schedule one person, for example, to be working in a certain department for an entire day or the first half of it. But like I said it is based around customer needs so if last year there were no sales for clothing between opening and closing...today it more than likely wouldn't schedule an associate to work in that department, even tho people will probably have questions about clothing for example.
Cashier turn-over is very high. I think part of this is cashiers tend to be younger people going to school and paying their dues...and because people get burned out with the pressure to not only check customers out but also having to sell certain membership benefits like upgrades to Plus and Credit Cards.
A cashier is required to also sell membership upgrades to the Plus Membership at their checkout register. This can be stressful at times because of pressure to get however many are required for that cashier during their shift. Be prepared to push selling Plus and develop a salesman personality.