A method and apparatus for generating an agent schedule for a multi-contact center that has immediate queues and deferred queues. In one embodiment, a method includes scheduling software receiving a plurality of scheduling data from a user interface, and the scheduling software generating a plurality of scheduling constraints. The method further includes a search engine using the plurality of scheduling constraints to generate a plurality of potential schedules including first potential schedules for immediate queues, and second potential schedules for deferred queues. The method further includes performing a first analysis on the first potential schedules to generate first estimated service levels, and performing a second analysis on the second potential schedules to generate second estimated service levels, wherein the first estimated service levels and the second estimated service levels are expressed in interchangeable units.