4.1 Contract Award and Contract WBS Approval. The requirement
for providing the WBS dictionary using Data Item Description DI-MGMT-81334B,
“Contract WBS” identified in the Contract Data Requirements List (CDRL) is
included in the contract development process. Additional WBS revisions may
result from program changes. Additional contract elements will become the
basis for contractor extension of the Contract WBS. Although there is no limit
on the number of additional elements, each should be justified in terms of its
contribution to effective program management. All extensions should be
incorporated into the Contract WBS reporting level in the contract.
Users of this handbook should understand that the sequence described in the
preceding paragraphs may be repeated as the program evolves, contracts are
awarded, and the work effort progresses through major program phases.
Revisions to the WBS are an essential component of this process. Whenever the
WBS is revised, traceability to the previous WBS needs to be maintained. Once
work is underway, WBS changes should be controlled to preserve the cost
baseline. The Contract WBS requires a contract modification before
approved changes can be incorporated.