Assessment is a critical component of project-based learning, particularly in large-scale software engineering courses such as the iPraktikum. Effective assessment must support structured evaluation and enable actionable feedback for individual and team performance. However, the current grading process in the iPraktikum relies on manual data entry and lacks support for modular workflows, multi-perspective assessment, and data-driven feedback. This thesis proposes the design and implementation of a standardized, modular assessment tool within the PROMPT system to address these limitations. The objective is to improve the assessment process along three dimensions: enhancing usability by replacing manual data handling with integrated digital workflows; introducing structured procedures for peer-, self-, and instructor assessment supported by clear guidance; and providing a configurable, template-based framework adaptable to future iterations and other project-based courses to ensure sustainability.