Internal communication is a fundamental element in building effective teamwork, particularly in hotel banquet departments characterized by high coordination intensity and time pressure. This study aims to analyze internal communication patterns in building effective teamwork among banquet staff at Hotel Gumaya Semarang. A qualitative approach with case study design was employed to explore the phenomenon in-depth. Data were collected through in-depth interviews with 12 informants, participant observation, and document analysis, then analyzed using the interactive model of Miles, Huberman, and SaldaƱa. The findings reveal three dominant forms of internal communication: vertical communication (instructions and reports), horizontal communication (peer coordination), and diagonal communication (cross-departmental coordination). Factors supporting communication effectiveness include technology support, supportive leadership, openness culture, and briefing routines, while inhibiting factors comprise time pressure and shift differences. Internal communication patterns contribute to teamwork dimensions including team coordination, collaboration, and team cohesion. The practical implications suggest the importance of intensifying daily briefings, optimizing communication technology, and developing structured handover systems to enhance teamwork effectiveness in banquet departments.
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