What's the critical element when designing a successful hospital's water management program according to ASHRAE 188 standard?

The critical element when designing a successful hospital's water management program according to ASHRAE Standard 188, Legionellosis: Risk Management for Building Water Systems, is conducting a comprehensive Hazard Analysis and Critical Control Point (HACCP) analysis to identify and control potential sources of Legionella growth and spread throughout the building water systems. The HACCP approach involves identifying potential hazards (e.g., water temperatures in the Legionella growth range, stagnant water, biofilm formation), determining critical control points (CCPs) where control measures can be applied (e.g., hot water heaters, cooling towers, ice machines), establishing critical limits for each CCP (e.g., maintaining hot water temperatures above 140°F), implementing monitoring procedures to verify that the CCPs are within the critical limits, establishing corrective actions to be taken if a CCP is out of control, maintaining accurate records of all activities, and verifying that the water management program is effective. This systematic risk assessment and control approach ensures that all potential sources of Legionella are identified and addressed, minimizing the risk of Legionnaires' disease. The HACCP analysis must also be regularly reviewed and updated to reflect changes in the building water systems, operating conditions, and applicable regulations. A crucial component is also assigning a multidisciplinary team responsible for the implementation and oversight of the water management program.