Enrico, A. and Kurniawati, A. 2026. Shift-Left Testing in the Software Testing Life Cycle: Evidence from the Ruang Murid Application on Time Efficiency and Software Quality. International Journal of Management Science and Information Technology. 6, 1 (Apr. 2026), 348–358. DOI:https://doi.org/10.35870/ijmsit.v6i1.6610.