Task Dependency Mapping: Stopping Dominoes Before They Fall

"I just modified one login feature..." It was a simple login UI improvement. Just changed button color and slightly modified layout, But 72 hours later, the entire payment system was paralyzed. Service was down for 3 days, losses exceeded 5 billion won. Post-analysis results were shocking. Login module → Session manager → Auth server → Payment security module. No one fully understood this deep chain of relationships. A change that seemed simple at first, But when actually progressing, problems occurred in unexpected places. "Why does it affect here too?" and panicked. According to MIT research, 38% of software project failures are due to dependency management failures. More surprising is that 67% of developers don't know more than half of their code's dependencies. We're dancing on invisible spider webs. Why Dependencies Are Invisible 1. The Trap of Implicit Dependencies "Why does backend team approval need to change this button color?" A new designer's natural question. But that butto