Table 1.

Four job requirement levels defined in KldB 2010 (Paulus and Matthes 2013)

Job requirement level		Normally required vocational qualification
1	Unskilled or semi-skilled activities	No vocational qualification, or regular one-year vocational training, required
2	Specialist activities	At least two years of vocational training, also graduation from vocational school
3	Complex specialist activities	Qualification as master craftsman or technician or equivalent technical school or college graduation, also graduation from a professional academy or university bachelor's degree
4	Highly complex activities	Completed university studies of at least four years