<![CDATA[Community arts festivals in Yogyakarta rely heavily on voluntary labor, yet the simultaneous contributions of leadership coordination and volunteer commitment to perceived operational effectiveness remain underexamined. This cross-sectional explanatory survey enrolled 180 volunteers and committee members across 15 community arts festivals in five kemantren of Yogyakarta City between November 2025 and March 2026. Participants completed a 24-item instrument assessing leadership coordination (LC), volunteer commitment (VC), and perceived operational effectiveness (OE) on a five-point Likert scale, with satisfactory internal consistency across all constructs (LC: α = 0.877; VC: α = 0.861; OE: α = 0.852). Pearson correlations indicated moderate positive associations between LC and OE (r = 0.525, p < .001) and between VC and OE (r = 0.465, p < .001). A random-intercept multilevel regression model was applied to accommodate the nested structure of respondents within festival clusters. After adjusting for age, festival experience, and volunteer role, both LC (B = 0.406, SE = 0.055, p < .001) and VC (B = 0.326, SE = 0.055, p < .001) were independently and positively associated with perceived operational effectiveness. Festival-level variance accounted for approximately 24.8% of outcome variation (ICC = 0.248), underscoring the necessity of cluster-adjusted analysis. These findings extend theoretical understanding of organizational coordination and commitment in volunteer-intensive event settings and offer practical guidance for festival organizers seeking to enhance operational outcomes through effective leadership practices and volunteer engagement strategies.]]>
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