* Corresponding author E-mail address zeplin@petra.ac.id (Z. J. H. Tarigan) © 2022 Growing Science Ltd. All rights reserved. doi: 10.5267/j.uscm.2022.6.008 Uncertain Supply Chain Management 10 (2022) 1479–1492 Contents lists available at GrowingScience Uncertain Supply Chain Management homepage: www.GrowingScience.com/uscm The effect of top management commitment on improving operational performance through green purchasing and green production Sautma Ronni Basana a , Hotlan Siagian a , Sahnaz Ubud b and Zeplin Jiwa Husada Tarigan a* a Faculty Business, and Economics, Petra Christian University, Jl.Siwalankerto 121-131, Surabaya, Indonesia b Entrepreneurship Department, BINUS Business School Undergraduate Program, Bina Nusantara University, Jakarta, Indonesia 11480 A B S T R A C T Article history: Received March 23, 2022 Received in revised format April 25, 2022 Accepted June 14 2022 Available online June 14 2022 This research has investigated the impact of top management commitment to enhance operational performance through green purchasing and green production Practices in the manufacturing industry. The study has surveyed 122 from 578 manufacturing companies domiciled in East Java, Indonesia, using a questionnaire designed with a seven-point Likert scale. Data analysis used the partial least square. The result revealed that top management commitment affects green purchasing, green production practices, and operational performance. Furthermore, operational performance is directly affected by green purchasing and green production. The green purchasing affects green production. In addition, top management commitment indirectly improves operational performance through green purchasing and green production. This result provides essential insight for the manager in the manufacturing industry that top management commitment and practicing green purchasing, and green production enhances operational performance. Furthermore, this research extends the acceptance of previous research related to top management commitment, green purchasing, and green production in improving operational performance. The novelty of this study is the revelation of the mediating role of green purchasing and green production in the influence of top management commitment on operational performance. Hence, this study contributes to enriching the current research in supply chain management. All rights reserved. Growing Science Ltd. 2 2 © 20 Keywords: Green purchasing Green production Top management commitment Operational performance 1. Introduction In recent years, environmental protection has gotten a lot of attention, and scientists have emphasized the importance of limiting global warming. As a result, international leaders from more than 40 countries have attended the global climate summit. The Summit emphasized how these climate goals would create well-paying jobs, drive technological innovation, and assist developing countries in adapting to the effects of climate change (Whitehouse, 2021). Based on the suggestion, numerous groups began to demonstrate care for the environment because of the growing global awareness of the need for environmental preservation (Kalyar et al., 2020). This eco-friendly philosophy of nurturing the Earth’s source has reached a tipping point, putting pressure on businesses to start thinking critically about establishing ecologically responsible business practices. Green supply chain practices are considered to have a potential contribution throughout the supply chain process, from suppliers to manufacturers to customers, and until the product is disposed of (Siagian & Tarigan, 2021; Yu et al., 2014; Nguyen et al., 2022). The cost of procuring raw materials, energy usage, waste management, and environmental harm can all be reduced through cost effective techniques, boosting the company’s operational performance (Santoso et al., 2022). Green purchasing is one of the ways to address the issue of environmental sustainability. Research has claimed that the economic value of environmentally sustainable development improves operational performance (Ambekar et al., 2021; Dubey et al.,