In establishing the time for contract completion, the purchase/SCM team should consider, among other things, the nature and complexity of the project, the construction seasons involved, the availability of equipment, labor and other factors and the increased cost for an aggressive project schedule. In any given contract, separate completion periods may be established for separable items of work. When such periods are shown, requests for time extensions must be evaluated for each item, and all affected completion periods must be modified when appropriate.