On a high-rise project, the project manager assumed that the foundation walls had been poured perfectly per plan. No one re-checked the elevations or alignment before the next phase of framing began. By midweek, the first beams were misaligned, scaffolding clashed, and corrective work cost the team multiple days and thousands of dollars. Sun Tzu warned against the enemy we do not see. In construction, that enemy is assumption. Every unverified belief about a site, schedule, o