The certification of our QM-system according to DIN EN ISO 9001 by the DQS in 1994 was the appreciation of our customer-oriented efforts. At the beginning of 2001 the DQS has examined all areas of PETER GREVEN for the second time and came to the result that the high quality standards are further completely fulfilled according to DIN EN ISO 9001. For the customers this is the warranty to receive verifiable and constant quality at any time.