Setyawan, T.H., Marsono, M. dan Mobo, F.D. 2026. Shadow Core Development to Reduce Hidden Waste in Operator Tool Management in the Manufacturing Industry. Jurnal Pendidikan dan Teknologi Indonesia. 6, 9 (Sep 2026), 2137-2145. DOI:https://doi.org/10.52436/1.jpti.1555.