olemus
meetod, mis juhib iteratsiooni sooritamist
= any method of successive approximation

https://duckduckgo.com/?q=iteration+scheme&t=h_&iax=images&ia=images

näiteid
(i) programmis, ISO/IEC 2382:
meetod silmusest väljumise otsustamiseks,
näiteks osalause "do ... while"
= method used in the loop control to determine whether to exit from a loop
Example: A "do ... while" clause.

(ii) matemaatikas
lahendusprotseduur sammudena, mis tekitavad eelmise sammu põhjal uue lähendi
= a mathematical procedure that uses an initial value to generate a sequence of improving approximate solutions for a class of problems, in which the n-th approximation is derived from the previous ones
https://en.wikipedia.org/wiki/Iterative_method