A queue-based scheduling system, which comprises an automated staff scheduling computer program that is highly flexible in enforcing scheduling rules. This flexibility comes from the ability to: (1) Define conditional and unconditional rules; (2) Rank the rules/requests in varying priority as represented by a numeric value assigned to each rule/request; and (3) Specify rules both per individual and per group. These three abilities synergistically produce an automatic scheduling system that can enforce a wide variety of scheduling rules and requirements seen in actual staff scheduling situations. Furthermore, all these abilities rely on using a queue per scheduled assignment to hold requests and rules.