Bathtub Curve

Published by MBA Skool Team, Last Updated: January 22, 2018

What is Bathtub Curve?

Bathtub curve is a term pertaining to quality of products or reliability engineering. It describes one particular form of a hazard function which is further divided into three sections as follows:

  1. The first section of hazard is the early failure hazard, where the hazard rate is very high initially but goes on decreasing steeply with time as the defective products are identified.
  2. The second section has almost a constant level of hazard as it is mainly due to random errors present in the products.
  3. The third and the final section is referred to as the wear-out error where the hazard goes on increasing with time. It is mainly the period after the design lifetime of the product and thus the increase in hazard.

An image of a typical bathtub curve is as below and it derives its name from the cross-sectional view as is visible below.


This article has been researched & authored by the Business Concepts Team. It has been reviewed & published by the MBA Skool Team. The content on MBA Skool has been created for educational & academic purpose only.

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