Kurnia H, Juliantoro KB, Suhendra S, Zy AT, Apriyani A. Combination of lean thinking and A3 problem-solving methods to reduce the cost of purchasing cleaning agents in a paint manufacturer in Indonesia. Sinergi [Internet]. 2023 Dec. 20 [cited 2026 Jun. 2];28(1):103-14. Available from: https://publikasi.mercubuana.ac.id/index.php/sinergi/article/view/21371