A Parameter Classification System for Nonrevenue Water Management in Water Distribution Networks

Table 2

PI themes recommended by international organizations [7, 8].

IWA (2006)	IBNET (2005)	WHO (2000)	WB (1999)
(i) Water resources; (ii) Personnel; (iii) Physical; (iv) Operational; (v) Quality of service; (vi) Economic and financial	(i) Service coverage; (ii) Water consumption and production; (iii) NRW; (iv) Metering practices; (v) Pipe network performance; (vi) Cost and staffing; (vii) Quality of service; (viii) Billing and collection; (ix) Financial performance; (x) Assets; (xi) Affordability; (xii) Process indicators	(i) User satisfaction; (ii) Community management; (iii) Financial; (iv) Level of service; (v) Materials; (vi) Personnel; (vii) Equipment; (viii) Work control	(i) Coverage; (ii) Water consumption and production; (iii) Water unaccounted for; (iv) Metering practices; (v) Pipe network performance; (vi) Cost and staffing; (vii) Quality of service; (viii) Billing and collection; (ix) Financial performance; (x) Capital investment