Routine decision making is a system or process used to make decisions that are consistent or lacking in involvement. Decisions that people make on a daily basis and that require little research or time investment are often considered routine.
In a business, decisions to purchase new inventory when supplies run low is relatively routine since it is something the company does often and is necessary for operations. In contrast, a major investment in a new building or asset is normally not routine, since it is irregular and highly involved. The more a person knows about a particular domain or topic, the more likely it is for repetitive decisions to become routine.