Sunday Ayoola Oke and Desmond Eseoghene Ighravwe 2026. Prediction of maintenance workforce efficiency using neural networks, fuzzy inference system and autoregressive fractionally integrated moving average for a process industry. Vietnam Journal of Science, Technology and Engineering. 68, 2 (Jun. 2026). DOI:https://doi.org/10.31276/VJSTE.2025.0067.