Fatmarin, ZahraUtami, Fidya AhdiatiFidya AhdiatiGirsang, Gabriela Chelvina SantiulyMulya, Sri Zahra Mina SetyaniFentiana, Vina DianPutri, Yashinta KiranaNandiyanto, Asep Bayu Dani2023-05-142023-05-142020-12-15Fatmarin ,Zahra. Utami ,Fidya Ahdiati. Girsang ,Gabriela Chelvina Santiuly. Mulya ,Sri Zahra Mina Setyani. Fentiana ,Vina Dian. Putri ,Yashinta Kirana. Nandiyanto Asep Bayu Dani. Economic evaluation of zinc oxide nanoparticle production through green synthesis method using Cassia fistula plant extract. International Journal of Energetica. Vo5. No 02.15/12/2020.faculty of technology. university of el oued. [visited in ../../….]. available from [copy the link here2543-3717http://dspace.univ-eloued.dz/handle/123456789/22842ArticleThe purpose of this study was to determine the feasibility of a zinc oxide (ZnO) manufacturing project through a green synthesis method using plant extracts Cassia fistula and then evaluate it from an engineering and economic perspective. Several economic evaluation parameters are analyzed to inform the potential production of ZnO nanoparticles, such as the length of time required for an investment to return the total initial expenditure (PBP), the condition of a production project in the form of a production function in years (CNPV), project benefits and so on. The results showed that the production of ZnO nanoparticles was very prospective. Technical analysis to produce 250 kg of ZnO nanoparticles per day shows the total cost of the equipment purchased to be 21,450.00 USD. PBP analysis shows that investment will be profitable after more than three years. This project can compete with PBP capital market standards because of the short investment returns. To ensure the feasibility of a project, the project is estimated from ideal conditions to the worst case in production, including labor, sales, raw materials, utilities, and external conditions.enZinc Oxide, Green synthesis, economic evaluationArticle