Hasbullah, H., Bareduan, S. A., & Hasibuan, S. (2021). Developing I4.0 Readiness Index for Factory Operation in Indonesia to Enhance INDI 4.0. International Journal on Advanced Science, Engineering and Information Technology, 11(4), 1668–1677. https://doi.org/10.18517/ijaseit.11.4.14280