Here is the QS toolkit: https://bva.usercontent.opencode.de/softwaretest/qs-baukasten/
The BVA’s modular software testing and QS toolkit consists of building blocks, each covering a selected topic. A building block gathers information, contextualises it and explains concepts. Information is provided at different levels, so that individual decisions can be taken on the level of their own need to penetrate the subject matter more deeply. Building blocks provide information in small completed learning units that can be accessed independently of each other depending on current needs. As a general rule, such units can be processed in less than 10 minutes. A simple four-stage maturity model has also been developed. Users can determine the position with regard to the software testing and QS measures carried out in their project or procedure by means of a self-assessment using a targeted and tested questionnaire. Following the self-assessment of one of the ripeness levels offered, suggestions for improvement are made to achieve higher maturities. These suggestions for improvement are strictly practical and supported by appropriate tools (templates, templates and checklists) and the content is directly related to public service practices and applications.