I never heard of "computer aided management / QAM", and from a quick Google-Search it seems that Peter <us> is right about it being German usage (comes up almost exclusively on .de, .ch .at sites or sites of German companies / universities), but quality management (QM) is not a German concept, nor is it the same as quality assurance.
See here, for example:
"From a quality management standpoint, the following discussion may be considered in developing, implementing, and monitoring Data and Safety Monitoring Plans (DSMPs). Quality Management includes the concepts of quality improvement, quality assurance and quality control."http://gcrc.uthscsa.edu/dsmp/dsmp-qm.htm
"Welcome to the official ISO/TC 176 website. This website is the home of the International Organization for Standardization's (ISO) Technical Committee 176 on Quality Management and Quality Assurance -- the committee responsible for developing the ISO 9000 series of standards and guidance documents."http://www.tc176.org/
Here are some glossaries, the last one has both English and German terms:http://www.1stnclass.com/quality_glossary.htmhttp://www.quality.de/lexikon.htmhttp://www.projektmagazin.de/glossar/index.html