rationalisation

Noun

• systematic organization; the act of organizing something according to a system or a rationale

• the organization of a business according to scientific principles of management in order to increase efficiency

• (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation

• the cognitive process of making something seem consistent with or based on reason

• (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening

Related words

• Synonyms: 
  systematization , systematisation , rationalization