The Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia (DTE FTUI), has once again achieved an outstanding academic milestone in the field of Building Energy Efficiency. Imam Arif Rahardjo successfully completed his doctoral studies with a GPA of 3.96 and graduated with the distinction of Highly Satisfactory. He officially became the 198th doctoral graduate of the Department of Electrical Engineering and the 658th doctoral graduate within FTUI.
In his dissertation titled “Spatial Clustering of Electrical Energy Consumption Intensity Index in Office Buildings in Indonesia Using Random Forest and Fuzzy C-Means Models,” Imam addressed the issue of energy efficiency in office buildings across Indonesia. The research aimed to classify Indonesian provinces based on temperature and humidity characteristics in relation to the spatial Energy Use Intensity (EUI) index. Utilizing data from 38 provinces, the study developed a predictive model based on the Random Forest algorithm, which was subsequently applied in the clustering process using the Fuzzy C-Means method.
“The main advantage of this research lies in its approach, which combines artificial intelligence, spatial analysis, and local climate data to produce more accurate energy consumption mapping. Unlike conventional approaches that rely on a single national standard, the model developed by Imam is capable of adapting to the temperature and humidity characteristics of each region, making energy efficiency assessments more relevant and precise. In addition, the use of a soft clustering method allows a region to have similarities with more than one characteristic group, reflecting Indonesia’s complex and diverse geographical conditions,” explained Imam.
The research findings identified eight major clusters representing regions with similar climate characteristics and electrical energy consumption intensity. These findings are expected to serve as a foundation for developing more adaptive, contextual, and region-based energy efficiency policies in support of national energy efficiency targets. Furthermore, the model has the potential to assist the government, building managers, and industry sectors in designing more targeted energy-saving strategies.
The Dean of the Faculty of Engineering, Universitas Indonesia, Prof. Kemas Ridwan Kurniawan, S.T., M.Sc., Ph.D., expressed his appreciation for the achievement.
“The success of Imam Arif Rahardjo in earning his doctoral degree reflects FTUI’s commitment to producing innovations and tangible contributions to the nation through excellent research. This study on spatial data–based energy efficiency is highly relevant to the challenges of sustainable development and the national energy transition. We hope the results of this research can provide broad benefits for the development of public policy, industry, and society,” said Prof. Kemas.
The research findings were presented during the open doctoral defense held on April 30, 2026, chaired by Prof. Dr. Ir. Akhmad Herman Yuwono, M.Phil.Eng. Serving as promoter was Prof. Dr. Ir. Iwa Garniwa, M.K., M.T., Professor at the Faculty of Engineering, Universitas Negeri Jakarta, with Dr.-Ing. Budi Sudiarto, S.T., M.T. acting as co-promoter. The examination committee consisted of Prof. Dr. Suyitno Muslim, M.Pd., Prof. Ir. Rinaldy Dalimi, M.Sc., Ph.D., Prof. Dr. Ir. Rudy Setiabudy, DEA., Ismi Rosyiana Fitri, S.T., Ph.D., and Faiz Husnayain, S.T., M.Sc., Ph.D.
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