HIDAYAT, Wanda Gema P.A. The Employees Perception Analysis toward The Operational Expectation and Reality based on Ishikawa and Spider Plot Methods at PT. Tata Makmur Bersama – Sidoarjo ,Indonesia. Sigmagri, [S. l.], v. 3, n. 1, p. 21–29, 2023. DOI: 10.32764/sigmagri.v3i01.904. Disponível em: https://ojs.unwaha.ac.id/index.php/sigmagri/article/view/904. Acesso em: 3 apr. 2025.