On the European tour, it simply works by how much money has been earned during the season. It is calculated in Euros and whoever has the most Euros at the end of the season is the winner of the Order of Merit.
Order of Merit happened in 1902.
Order of the Merit of Chile was created in 1929.
Indian Order of Merit was created in 1837.
Saskatchewan Order of Merit happened in 1985.
2007- Justin Rose won the European Tour Order of Merit.
Bavarian Order of Merit was created on 1957-06-11.
Sharifian Order of Military Merit was created in 1976.
Order For Merit to the Fatherland was created on 1994-03-02.
Order of Merit of Berlin was created on 1987-07-21.
Order of Merit for Labour was created on 1901-05-09.
Hessian Order of Merit was created on 1989-12-01.