Leaders love the rush of delivering something fast; the dopamine hit of a headline‑grabbing launch feels like proof of competence. What they overlook is the “speed‑bias cascade,” a chain where urgency compresses verification loops, amplifies hidden assumptions, and ultimately erodes decision quality. When a deadline is perceived as immovable, teams replace deliberate cross‑checks with shortcuts, trusting that the next step will catch any mistake. That trust is misplaced because each shortcut removes a layer of independent validation, turning a single error into a systemic vulnerability.

The Mars Climate Orbiter’s fate illustrates the cascade. Engineers in California calculated thrust in pound‑force seconds, while the navigation team in Colorado entered the same data as newton‑seconds. A single unit mismatch, unchecked because the launch timeline left no room for a final “unit‑audit” meeting, sent the probe into a fatal orbit. The loss was not a technology failure; it was a human‑process failure driven by the pressure to move fast.

If you replace “fast‑first” with a brief pause for a cross‑functional unit sanity check, you add a low‑cost friction that catches the majority of such errors. The trade‑off is a few extra minutes, but the payoff is a dramatic reduction in catastrophic risk.