WBS Review Process: 1 Missing Task Out of 1000 Ruins the Project

A single missing task in a 1000-item WBS caused a 2-week launch delay and 2 billion won in wasted marketing costs, illustrating why systematic WBS reviews are essential. NASA research shows projects with systematic WBS reviews have an 89% success rate versus 34% without. The article proposes a 4-layer review system—completeness, technical, and additional perspectives—modeled after Intel's chip design process to reduce defect rates.