cumulativemistake

noun
UK /ˈkjuːmjələtɪv mɪˈsteɪk/
US /ˈkjuːmjəleɪtɪv mɪˈsteɪk/

A cumulative mistake is a mistake that adds up over time because you keep making small ones.

The bridge collapsed due to a cumulative mistake in the design that went unnoticed for years.


OTHER MEANINGS

2. An error whose effects grow larger as more small errors are added together.

Small rounding errors became a cumulative mistake that ruined the final calculation.

3. A mistake that results from many small decisions rather than one big wrong choice.

The company's failure was a cumulative mistake of poor hiring and weak planning.

4. A repeated error that builds up and becomes serious over time.

Ignoring safety checks was a cumulative mistake that eventually caused an accident.