A well-defined work to be accomplished in completing a function, activity, or task. Most work packages are relatively small in nature and can be accomplished by 2-4 individuals in 2-4 weeks. A work package should have a unique name and identifier, preconditions for initiating the work, staffing requirements, other needed resources, work products to be generated estimated duration, risks factors, predecessor and successor work tasks, any special considerations for the work and the completion criteria for the work package - including quality criteria for the work products to be generated.