tailieunhanh - Effective utility management phần 4

Ví dụ tính toán: Uống nước dòng chảy và áp suất (%): 100 X [số lượng khách hàng ít hơn (dòng chảy của "X" gallon mỗi phút (gpm) và áp lực của "Y" pounds mỗi inch vuông (psi)-mức quy định tiện ích) ÷ tổng số khách hàng] (trong kỳ báo cáo, thường mỗi tháng). | Page 26 Effective Utility Management Example calculations Drinking water flow and pressure percent 100 X number of customers with less than flow of X gallons per minute gpm and pressure of Y pounds per square inch psi -levels set by utility total number of customers during reporting period typically per month . Fire suppression water flow and pressure percent 100 X hours of time when flow of X gpm and pressure of Y psi levels set by utility is available for fire suppression at maximum day demand total number of hours when fire suppression water should be available at maximum day demand during reporting period typically per month . Service interruptions percent 100 X number of active account customers experiencing a service interruption of greater than 1 hour total number of customers during reporting period typically per month . Note the utility may elect to measure planned and unplanned interruptions separately. Water quality goals met not met Number of days in reporting period typically one month where utility-defined beyond-compliance targets are met not met. Sewer backups if not included in permit requirements amount and percent Number of customers experiencing backups each year 100 X number of customers experiencing backups each year total number of customers . Sewer overflows if not included in permit requirements Number of sewer overflows per 100 miles of collection system piping. Water reuse amount and percent Amount Amount of water supplied that is from reused recycled sources. Percent 100 X amount of water supplied that is from reused recycled water total amount of water supplied . Then as desired these amounts can be broken into recipients applications . irrigation agriculture industrial processes etc. . Biosolids put to beneficial use percent 100 X amount of biosolids produced that are put to a beneficial use total amount of biosolids produced in wet tons per year . A Primer for Water and Wastewater Utilities Page 27 Customer Satisfaction 1. Customer