This article explains how operational integration links automation and workforce capability to sustained operational efficiency. The study applies an integrative literature review and conceptual synthesis of 32 journal articles published from 2016 to 2026, selected based on construct relevance, traceable metadata, methodological transparency, and evidence proximity. The synthesis proposes two indirect paths. First, automation influences sustained operational efficiency through operational integration. Second, workforce capability influences sustained operational efficiency through operational integration. Partial mediation is the main theoretical expectation because both antecedents may also generate direct benefits. Sustained operational efficiency comprises persistent reductions in process costs, cycle time, resource use, defects, and rework without compromising quality and reliability. Islamic management serves as an ethical lens for assessing itqan, accountability, and waste avoidance rather than as a causal variable. This conceptual model requires longitudinal and multisource validation.
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