The doctrine means judges follow past decisions, meaning people know what the law is in any given area and know how it is likely to be applied in their case. This then allows lawyers to predict the outcome of cases, which is essential to clients in both civil and criminal cases. In civil cases, this can impact of whether someone pursues a claim or not, and in criminal cases it can affect a persons plea. Certainty in the law is also important to businesses, it allows people to run their business knowing that the arraignments they make are recognised by law.