1 25-50% – 0 - >50% of annual billed revenue 8.4 sanitation 8.4.1 Customer service days loss factor”. If 5 No loss of service even from Loss of service refers to service from the “Water/sanitation – “most at risk of loss. severe” scenario main water or sanitation system for the a = estimated # of days to restore neighborhood or city, if present. It excludes the use of back up supplies or portable regular service area-wide 4 No loss of service even from – “most sanitation systems. probable” scenario b = % of user accounts affected 3 Loss factor of 1-25% from most If the supply is a localized water main – supply or sanitation system (eg well or septic probable” scenario then water/sanitation loss … tank), this may in fact prove more factor = a x b than a city-wide system. 2 Loss factor of 25-100% from – probable” scenario (Example 1.5 day’s loss of “most – Loss of service needs to be assessed relative service for 10% of user accounts to the state. For example: in city = loss factor of 15%; 3 1 Loss factor of 100-200% from “normal” – days’ loss of service for 50% of probable” scenario “most user accounts in city = loss If service is potable running “normal” water in every house, 24 hours a day - factor of 150%) 0 Loss factor >200% from – “most then loss of service needs to be assessed probable” scenario as the removal or diminution of this service; If is running water for “normal” washing but not drinking, 24 hours a day - then loss should be assessed relative to this; If is either of the above but “normal” only for some hours a day, then the loss is relative to the number of “normal” hours ie, where user accounts have – even fewer hours a day of availability until service is restored; If is standpipes or communal “normal” toilets, then loss is relative to this - the loss factor will be calculated by
1 – 25-50% 0 - >50% of annual billed revenue 8.4 sanitation 8.4.1 Customer service days at risk of loss. “Water/sanitation loss factor”. If a = estimated # of days to restore regular service area-wide b = % of user accounts affected … then water/sanitation loss factor = a x b (Example – 1.5 day’s loss of service for 10% of user accounts in city = loss factor of 15%; 3 days’ loss of service for 50% of user accounts in city = loss factor of 150%) 5 – No loss of service even from “most severe” scenario 4 – No loss of service even from “most probable” scenario 3 – Loss factor of 1-25% from most probable” scenario 2 – Loss factor of 25-100% from “most probable” scenario 1 – Loss factor of 100-200% from “most probable” scenario 0 – Loss factor >200% from “most probable” scenario Loss of service refers to service from the main water or sanitation system for the neighborhood or city, if present. It excludes the use of back up supplies or portable sanitation systems. If the main supply is a localized water supply or sanitation system (eg well or septic tank), this may in fact prove more than a city-wide system. Loss of service needs to be assessed relative to the “normal” state. For example: If “normal” service is potable running water in every house, 24 hours a day - then loss of service needs to be assessed as the removal or diminution of this service; If “normal” is running water for washing but not drinking, 24 hours a day - then loss should be assessed relative to this; If “normal” is either of the above but only for some hours a day, then the loss is relative to the “normal” number of hours – ie, where user accounts have even fewer hours a day of availability until service is restored; If “normal” is standpipes or communal toilets, then loss is relative to this - the loss factor will be calculated by
Resilience%20Scorecard%20Updated%20V2%20-%20April%2030th%202015.docx