The Project Management Tool Kit: 100 Tips and Techniques for Getting the Job Done Right

Changes

Manage all changes using the documented process in the contract and be consistent with your integrated change control process. Contract changes are often expensive and have other undesirable consequences, so avoid them whenever possible. If a necessary change goes beyond the terms of the contract or exceeds its financial limits, amend the contract and have both parties re-sign it, or negotiate a new contract to replace the original one.