exceedance

exceed +‎ -ance

• IPA^(key): /ɛkˈsiːdn̩s/, /ɪkˈsiːdn̩s/
• Hyphenation: ex‧ceed‧ance

exceedance (countable and uncountable, plural exceedances)

1. The extent to which an action, activity or substance exceeds a limit set by recommended practice, legislation, etc.
   • 1989, Ralph E. Morris, Mike W. Gery, Mei-Kao Liu, Gary E. Moore, Christopher Daly, Stanley M. Greenfield, “Sensitivity of a Regional Oxidant Model to Variations in Climate Parameters”, in Joel B. Smith, Dennis A. Tirpak, editors, The Potential Effects of Global Climate Change on the United States, volume 1, pages 2–18:

     A region is considered "nonattainment" of an air quality standard (NAAQS) if its estimated exceedance rate of the NAAQS is more than once per year over three years. Exceedances are counted in terms of days.

   • 1997 December, US General Accounting Office, Aviation Safety: Efforts to Implement Flight Operational Quality Assurance Programs, GAO/RCED-98-10, Report to Congressional Requesters, page 24,

     On a periodic basis, airlines aggregate and analyze exceedances over time—for example, the number of unstabilized approaches at a particular airport per month, over the last 12 months.

   • 2005, Patricia Grossi, Don Windeler, “Chapter 4 - Source, Nature, and Impact of Uncertainties on Catastrophe Modeling”, in Patricia Grossi, Howard Kunreuther, editors, Catastrophe Modeling: A New Approach to Managing Risk, page 78:

     As defined in Chapter 2, an exceedance probability curve is a graphical representation of the probability that a certain level of loss will be exceeded over a future time period.

• “exceedance”, in The American Heritage Dictionary of the English Language, 4th edition, Boston, Mass.: Houghton Mifflin, 2000, →ISBN.