In a design structure for allocating a plurality of parts of a computational system to a computational job, a set of requirements necessary to execute the job is determined. A set of parts of the plurality of parts is assembled so that the set of parts is capable of meeting the set of requirements and so that a part is added to the set of parts based on a determination that the addition of the part will minimize power consumption by the set of parts. The set of parts are caused to execute the job.