Supply Chain

Stockouts

The lost sales are the visible fraction — stockouts bill in momentum decay, customer defection, and panic freight, which is why winner gaps get rescued and every gap gets an autopsy.

  • Advanced
  • 6 min total
  • 10 chapters

What decision this helps you make: Your stockout triage rules by product status, and the autopsy habit that keeps each gap from repeating on schedule.

What this topic is

The stockout's full accounting: lost sales (understated by censored data), momentum decay (rankings and ad placements that take quarters to re-earn), customer defection (gaps convert to competitor trials), and scramble costs — with triage by product status and a post-incident audit.

Why it matters

Sellers who count only the missed revenue systematically under-rescue winners and over-panic on slow movers — and sellers who skip the autopsy schedule the next gap: every stockout is a system input that failed, with a name.

Who should learn it

Anyone who has run dry or will — the triage and autopsy are the difference between an incident and a pattern.

What you will understand

  • The four cost layers — and why lost sales are the smallest honest estimate
  • Why winner stockouts are disproportionately expensive: the momentum mechanism
  • Triage by status: rescue winners, manage steady products, shrug slow movers
  • The autopsy: every gap names a failed input

Prerequisites

Common misconception

"A stockout costs the sales we missed — two weeks dry, two weeks of revenue lost." That's the smallest layer. The gap decays rankings and ad placements that took quarters to earn (and take quarters to re-earn), sends replenishment customers to competitors who get to keep some of them, and bills panic freight on the recovery order. On winners, the visible lost sales are routinely the minority of the true cost — which is why the air-rescue math clears so easily, and why "we'll just wait for the boat" is usually the expensive choice wearing frugality's clothes.