Products > PSOP > Documentation PSOP says it may be impossible to achieve the same duration and overload as the original schedule. Why? A PSOP schedule is considered better if it either has less over-allocation than the original schedule or if it has the same amount of over-allocation but a shorter duration. In some situations it may be impossible for PSOP to produce a schedule that is better. This can happen if the original schedule is inconsistent (more information...). Even if the original schedule violates activity relationships or constraints, PSOP will honor them. PSOP might therefore produce a schedule that is longer, has more overload, or both, but this schedule will be consistent with your rules, and therefore, presumably, preferable. Note that if you request a deadline in the leveling options that requires the PSOP schedule to be shorter than the original schedule, PSOP may produce a schedule with more overload than the original schedule. Back to FAQ