In a contentious situation, our words or actions, however innocently or even benevolently conceived, are often used to make a case against us. In the case of a delay and disruption claim, this attack often begins with a project’s baseline schedule. The very tool created to help plan and manage a project suddenly becomes both a target and the first weapon in the opposing arsenal. Therefore, it is fundamentally important that the baseline schedule is beyond, or at least sufficiently shielded from, attack. Fortunately, building the baseline schedule on a few guiding principles goes a long way toward that end.