Maulani, R. and Handayati, Y. 2026. Reducing The Defect (Not Good) Rate to Improve Production Efficiency Using DMAIC: A Case Study of an Automotive Seat Cover Manufacturer. Economics and Business Journal (ECBIS). 4, 6 (Sep. 2026), 3453–3462. DOI:https://doi.org/10.47353/ecbis.v4i6.482.