2019年,我们的质量继续值得信赖:史比格市场研究所连续十一次通过TÜV认证。
The result of this year’s successful audit confirms the level of quality at all Spiegel Institut sites for the 11th time in a row. The TÜV audit according to the ISO 9001:2015 standard has been carried out annually since 2009. With this certification, Spiegel Institut is able to offer its customers the peace of mind that it continuously upholds proven quality standards.