This paper aims to study the determinants of the Lean Service System (LSS) on the Operational Performance (OP) of India's mail service in the National Sorting Hub (NSH), Mangaluru, Karnataka, the southern part of India. Measuring the OP in mail service is a big challenge in the postal service industry. Hence, we have conducted a survey, and 150 usable data has measured the impact of Lean Service Practices (LSP), Lean Workplace Environment Practices (LWEP), and Lean Social Practices (LSoP) on the OP. The results are analyzed from the partial least square based structural equation modelling (PLS-SEM) with the support of R programming. The analysis shows that there is positive and significant impact of LSP (β = 0.380, p < .05), followed by LWEP (β = 0.281, p < .05), and LSoP (β = 0.266, p < .05) on OP. The practical effect of the findings of LSS are effectively implemented for enhancing the OP of the business. This research addresses the appropriate empirical model to test LSS in India's postal service industry, which is scant in the existing literature. Moreover, this study helps India Post to review its policy so as to sustain the effectiveness of Lean Service (LS) implementation.

本文旨在研究精益服务系统 (LSS) 对印度南部卡纳塔克邦曼加鲁尔国家分拣中心 (NSH) 的印度邮件服务运营绩效 (OP) 的决定因素。衡量邮件服务的 OP 是邮政服务行业的一大挑战。因此，我们进行了一项调查，150 个可用数据衡量了精益服务实践 (LSP)、精益工作场所环境实践 (LWEP) 和精益社会实践 (LSoP) 对 OP 的影响。在 R 编程的支持下，从基于偏最小二乘的结构方程建模 (PLS-SEM) 分析结果。分析表明，LSP（β  =0.380，p  <.05）具有显着正向影响，其次是LWEP（β  =0.281，p  < .05) 和 OP 上的 LSoP ( β  = 0.266, p  < .05)。LSS研究结果的实际效果得到有效落实，提高了业务的OP。本研究探讨了在印度邮政服务业中测试 LSS 的适当经验模型，这在现有文献中很少见。此外，这项研究有助于印度邮政审查其政策，以维持精益服务 (LS) 实施的有效性。