slippage

noun

1. (countable, uncountable)The act of slipping, especially from a secure location.
2. (countable, uncountable)The amount by which something has slipped.
3. (countable, uncountable)A lessening of performance or achievement.

   “Supply-chain problems led to a slippage in production last week.”

4. (countable, uncountable)A decrease in motion, or in the power of a mechanical system, due to slipping.
5. (countable, uncountable)The difference between estimated and actual transaction costs.
6. (countable, uncountable)Movement of earth on a slope, a landslip.

   “The slippage at High Brooms was detected by remote sensors on the site, after two previous incidents in the same area.”