De acordo com a FAA em AC33.70-1 :
(b) The applicant should validate and maintain the accuracy of the engine flight cycle over the life of the design. The extent of the validation depends on the approach taken in the development of the engine flight cycle. For example, a conservative flight cycle where all the variables are placed at the most life damaging value would require minimum validation. A flight cycle that attempts to accurately represent the actual flight profile, but is inherently less conservative, would require more extensive validation. Applicants may apply further refinements to the engine flight cycle when significant field operational data is obtained.