olemus
struktuuri lihtsustamine ja/või täiustamine,
mis säilitab objekti välise käitumise,
eelkõige programmikoodi, puhul, aga ka
riistvarakavandi, andmebaasi vm objekti korral
= simplifying and/or improving the structure that preserves the external behavior of the object, especially in the case of program code, but also in the case of a hardware design, database, etc. object

ülevaateid
https://www.techopedia.com/definition/3865/refactoring

https://en.wikipedia.org/wiki/Code_refactoring

https://refactoring.guru/refactoring/techniques

https://ehsangazar.com/11-refactoring-methods-197a3921a196

https://www.altexsoft.com/blog/engineering/code-refactoring-best-practices-when-and-when-not-to-do-it/

http://www.math.uaa.alaska.edu/~afkjm/csce401/handouts/refactoring.pdf

https://doku.pub/download/martin-fowler-refactoring-improving-the-design-of-existing-code-2018-addison-wesley-object-el9rrgp1gjly