Sidik Sidin, U., Prasojo, K., Irfan, M. and Suhartono, S. 2025. Application Of Transformer Diagnostic Application To Improve Students’ Analytical Skills In Transformer Courses Of Electrical Engineering D4 Program. IJORER : International Journal of Recent Educational Research. 6, 4 (Jul. 2025), 987-1000. DOI:https://doi.org/10.46245/ijorer.v6i4.975.