Applying a DMAIC-based Process Improvement Framework to Improve Campus Water Efficiency: A Case Study of an Indian Higher Education Institution
摘要
This study presents an applied case study of campus-level water consumption to identify dominant inefficiencies and evaluate projected operational water savings using a structured DMAIC-based process improvement framework. Limited research has applied DMAIC-based approaches to campus water management in higher education institutions operating under resource constraints. Primary data were collected through continuous water-flow monitoring and fixture-level measurements across washrooms and toilets, reverse osmosis units, irrigation systems, and dining halls. Within the scope of the study, the four selected major consumption points accounted for 45,565 L per day of water consumption, representing 59.1% of total campus water consumption. Baseline analysis showed that washrooms and toilets dominated consumption (83.20%), with faucets, showers, and flush tanks accounting for the largest share. Reverse osmosis systems contributed 9.98% due to reject-water discharge, while irrigation systems accounted for 5.40% because of uncontrolled hose-based practices. Dining-hall hand-washing stations represented a smaller share (1.41%) but exhibited continuous-flow water loss. The analysis identified inefficiencies associated with high-flow fixtures, leakage, maintenance deficiencies, and operational practices. The proposed interventions, including flow-reduction devices, improved irrigation methods, and reuse of reverse osmosis reject water, are projected to reduce water consumption at the analysed points to 11,278 L per day, representing a projected reduction of 75.24% without major capital investment. The study demonstrates the application of a DMAIC-based framework for identifying operational water-efficiency opportunities using existing infrastructure and presents a practical management approach for campuses operating under financial and technical constraints.