When a contractor performs work beyond that required by the contract without a formal change order and it is perceived that such work was ordered by the Government or caused by Government fault this i?

This situation is typically referred to as "constructive change." When a contractor performs additional work without a formal change order, they may seek compensation if they can demonstrate that the work was necessary due to the government's actions or inactions. The contractor must provide sufficient evidence that the government effectively ordered the additional work or that it was required due to government fault. In such cases, the contractor may be entitled to a claim for an adjustment in contract price or time.