Market studies of automation in Germany:                                     

The following studies are stil published:

Market study
PLC / Industrial-PC
from the year 2005

Market study
Industrial communication
- Field bus / Ethernet / Wireless -
from the year 2008

only available in German

Market study
servo drives
from the year 2007

only available in German

Market study
Safety
(projected)

only available in German

Market study
Frequency inverters
from the year 2004

only available in German

Most studies are repetitions of studies of the University of Applied Sciences "FH Südwestfalen" in Germany

You can get information about further studies there. They all are only available in German.