Contributed to the AliceO2Group/O2Physics repository by developing a feature that adds a new axis for tracking the number of primary-vertex contributors within the data processing workflow. This enhancement, implemented in C++ with a focus on data analysis and scientific computing, enables the metric to be incorporated into histogram fills and used for evaluating D0 candidates, thereby improving the robustness of physics analyses. The work followed established O2Physics conventions, with clear, reviewable commits and thorough documentation. This addition not only strengthens current analysis capabilities but also lays the foundation for broader metric integration in future scientific studies within the project.