<![CDATA[Supervision is a process through which managers seek to determine whether the results of work performed by their subordinates align with the plan. Service quality involves consistently providing services while adhering to predetermined speed and timeliness. Work effectiveness refers to the completion of tasks precisely within the established timeframe. The research objectives are as follows: To determine whether supervision and service quality collectively influence the work effectiveness of Indonesian National Police (Polri) personnel at the Polri Education and Training Center (Lemdiklat) in Jakarta. The sampling technique used in this study was random sampling from a population of 451 Indonesian National Police personnel. Based on the Slovin formula cited in Husein Umar (2017), a sample of 82 individuals was selected. The results of the study indicate that, both partially and simultaneously, there is a positive and significant influence of Supervision and Service Quality on the Work Effectiveness of Indonesian National Police Personnel. In light of these findings, the following recommendations are made: 1) Leadership is encouraged to pay closer attention to supervision in accordance with the capabilities and available human resources within the relevant field. 2) High-quality service within the organization should be maintained across all aspects. 3) Future researchers are encouraged to measure the work effectiveness of Indonesian National Police personnel by incorporating additional variables beyond those included in this study.]]>
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