Objective: To document a participatory industrial-engineering intervention that addresses inconsistent coffee preparation, raw-material control, operator discomfort, and weak customer-feedback routines at Warkop SYIR, a micro coffee shop in Watampone, Indonesia. 
Methods: The 2026 community-engagement program was organized around a process diagnosis, jointly specified brewing and hygiene procedures, a low-cost ergonomic workstation redesign, operator coaching, and a Plan–Do–Check–Act review mechanism. Methods for assessing service time, first-pass product conformity, SOP adherence, stock traceability, and customer perception were formulated. 
Results: The documented diagnostic basis identified four interconnected operational deficiencies and produced a structured intervention package comprising recipe cards, checklists, zoning rules, and monitoring instruments. To illustrate evaluation, an explicitly synthetic 40-order-per-phase scenario yields a modeled service-time change from 6.31 to 4.70 min per order; it is not an observed outcome. 
Conclusion: Integrating quality standardization, task-level ergonomics, and feedback offers a feasible low-investment improvement framework. Verified field measurements remain necessary before claiming quantitative effectiveness.