Over the last decade, the need for quality in software has increased. Several quality models have been proposed [4, 6, 11]. These mod- els emphasize the need to have quality checks while developing a software program. As far as we are aware of, no model to assess quality of existing software have reached a significant acceptance. This paper describes the Qualixo quality model. Qualixo is an open-source quality model developed by several companies and pushed further in the context of the Squale research project. Ac- cording to Marinescu and Ratiu [9], Qualixo can be classified as a Factor-Criteria-Metrics quality model. Qualixo is being applied in large companies such as AirFrance or PSA. It uses measurements to assess software quality. These measurements cover a number of different aspects of a software, including specification accuracy, programming rules, and test coverage. Qualixo has been origi- nally implemented on top of Eclipse. In this paper we present Mo- Qam (Moose Quality Assessment Model), the implementation of the Qualixo quality model in the Moose open-source reengineering environment.