Energy optimization based on project life cycle (PLC): a literature review Uda Subrata Aditama Kittie Aidon, Frieda, Desriantomy, Meilawaty Okta, Supiyan, Devia and Saritha Kittie Uda E3S Web Conf., 467 (2023) 04008 Published online: 20 December 2023 DOI: 10.1051/e3sconf/202346704008