**5. Evaluation**

In the form of a cognitive walkthrough (CW) [26], an initial evaluation of the proof-of-concept implementation was accomplished by domain experts in the field of education in computer science. The evaluation's primary goal is to estimate the productive capacity of the implementation and orientate future development. The developed DST for the PAGEL project for RQ1 was presented and accepted by all project participants during a CW. The CWs for RQ2, RQ3, and RQ4 have been documented in [22–24, 29, 50, 53, 55]. The occurred errors and misbehaviors have been defined and fixed accordingly. Based on the evaluation, improvements and renewals were identified. These will be implemented and considered in future work.
