Ministry of construction


Adjustment to the original values of indicators



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  1. Adjustment to the original values of indicators

5.1. Principles and Methods of adjustment

As presented, due to the unavailability of the WSUs’ clarification the errors of calculated indicator values can be adjusted only by analysis of input data. Then, the adjustment principles and methods are as follows:



  1. The values which are unrealistic (non-existent) will be defaulted to the “ideal” values (which are achievable but very rare), specifically:

  1. A service coverage which is greater than 100 % will be defaulted to 100%

  2. A negative NRW will be defaulted to 0%

  3. A negative Water treatment plant Efficiency will be defaulted to 0%

  4. A revenue collection efficiency/ collection rate which is greater than 100 % will be defaulted to 100%

  1. The unreasonable values of indicators will be adjusted (if possible) according to one of the following methods:

  1. Adjustment according to the data collected from other sources, including:

  • The 2009 Vietnam Population and Housing census

  • The web-sites of related Provinces, Cities or Districts

  • The web-sites of related WSUs

  • The Annual reports of the Association of Water Supply and Sewerage Association of Vietnam (VWSA), including:

  • Report on the activities of the North Water Section, 2010- 2024 term.

  • Report on the activities of the Central Water Association Highlands Section, 2012- 2014 term.

  • Report 2013 activities of the Southern Section of the Association of water supply.

  1. Adjustment in accordance with the relevant input data of the WSU itself, namely:

  • The mathematical relation between the population data:

The population of the serviced area ≥ The population served

  • The mathematical relation among the water quantity data:

The annual volume of raw water treated ≥ the annual volume of water entered into distribution network ≥ the annual volume of water supplied to all customers

These relationships are presented in Fig. 1 and they are used as basis for selection of more appropriate data.



  1. The unrealistic or unreasonable values which can not be adjusted by the above mentioned principles will be ignored in calculating the national figures.

    1. Adjustment results

Adjustments and exclusions of original data or original indicator values for the 2012 database are listed in Table 2. The adjustments and exclusions of original data and indicator values in the 2012 database

  1. The Utility performance Indicators

6.1. Summary tables of Utility performance indicators for 2011 and 2012

All values of 47 indicators of each WSU among 77 ones who participated the 2012 database were reviewed and adjusted according to above methods and then summarized in 18 tables. These tables are included as 12 Appendixes (from Appendix 9 to Appendix 20) of this report. In these tables, it is included not only the indicator values for 2012 but also the respective values for 2011 in order to facilitate the comparison and evaluation of WSU’s performance.



To facilitate the search of any indicator among 47 indicators presented in different 12 tables, a cross-reference between indicator and respective table is provided in Table 3 below.
Table 3- The cross reference Indicator- Annex

Indicator

Annex

1.1

Water service coverage

Annex 9

1.2

Water service coverage in the core area (Grade Special to IV)

Annex 9

1.3

Water service coverage in all other secondary areas (Grade V and other areas)

Annex 9

2.1

Production utilization of capacity

Annex 10

2.1a

Production utilization of capacity (Grade Special to IV areas)

Annex 10

2.1b

Production utilization of capacity (Grade V and other areas)

Annex 10

2.2

Residential Water Consumption per capita

Annex 11

2.2a

Total Residential Water Consumption (Grade Special to IV)
(per capita consumption)


Annex 11

2.2b

Total residential Water Consumption (Grade V and other areas (per capita consumption)

Annex 11

2.3

Non-Revenue Water

Annex 12

2.3a

Non-Revenue Water (Grade Special to IV areas)

Annex 12

2.3b

Non-Revenue Water (Grade V and other areas)

Annex 12

2.4

Water Treatment Plant efficiency - water used at the water treatment plant

Annex 13

2.4a

Water Treatment Plant efficiency - water used at the water treatment plant (Grade Special to IV)

Annex 13

2.4b

Water Treatment Plant efficiency - water used at the water treatment plant (Grade V and other areas)

Annex 13

3.1

Meters checked, recalibrated or replaced per year

Annex 14

3.1a

Meters checked, recalibrated or replaced per year (Grade Special to IV)

Annex 14

3.1b

Meters checked, recalibrated or replaced per year (Grade V and other areas)

Annex 14

4.1

Pipe breaks (number of breaks/km/year) in whole network

Annex 15

4.1a

Pipe breaks (number of breaks/km/year) in whole TRANSMISSION network

Annex 15

4.1b

Pipe breaks (number of breaks/km/year) in whole DISTRIBUTION network

Annex 15

4.2

Investment in the development of the distribution system

Annex 15

4.3

Pipe rehabilitation or renovation

Annex 15

5.1

Electricity consumption per m3 of water produced (KWh/m3)

Annex 18

6.1

Unit (of ALL) Operational Cost (VND/m3 sold)

Annex 17

6.2

Unit (of ALL) Operational Cost (VND/m3 produced)

Annex 17

6.3

Energy and Operational Costs

Annex 18

6.4

Labor and Operational Costs

Annex 18

6.5

Chemical and Operational Costs

Annex 18

7.1

Staff per water supply connections (’000 )

Annex 19

7.2

Staff per population served (’000 )

Annex 19

8.1

Continuity of Service (hrs./day)

Annex 16

8.1a

Continuity of Service (hrs./day) for Grade Special to IV areas

Annex 16

8.1b

Continuity of Service (hrs./day) for Grade V and other areas

Annex 16

8.2

Quality of water supplied

Annex 16

8.3

Complaints about water supply services

Annex 16

9.1

Average Water Supply Revenue (VND/m3 water sold)

Annex 17

10.1

Average actual water price (VND/m3 water produced)

Annex 17

10.2

Proportion of approved water tariff to proposed one.

Annex 17

10.3

Average Water Supply bill for domestic customers (VND/m3 water billed)

Annex 17

11.1

Revenue collection efficiency

Annex 20

12.1

Operating Cost and Revenue

Annex 20

12.2

Debt Service Ratio.

Annex 20

12.3

Increase in residential connections over the year

Annex 20

12.4

vestment in domestic connections

Annex 20

13.1

Training and development of human resource

Annex 19

13.2

Total training costs per employee

Annex 19

6.2. The Quartiles

The quartiles of Indicator values of WSUs are summarized in Table 4. Summary of the quartiles of the Individual Utility Indicator values. For each indicator there are following values:



  • Minimum value (Min),

  • The first quartile (Q1): the middle number between the smallest number and the median of the data set;

  • The second quartile (Q2): the median of the data;

  • The third quartile (Q3): the middle value between the median and the highest value of the data set; and

  • Maximum value: Max




  1. National and regional indicator figures

7.1. National and regional indicator figures

Based on the Individual Utility Indicator values, the national figures (under two city types) and regional values (under six regions) were calculated.


These figures are summarized in Table 5. National and regional figures. They are included in the national and regional reports for 2012 published on the Web site.

























C 2.2













C1.1-1.3




























Water Consumption Rate













Service Coverage










A26-27






















A33*36



















Water abstracted






















Serviced Population


























































A65-67




A62-64

>

A 68-70

>

A 61= (49-51) +

58-60




A 33-35




A 36




A28- 30

Design Capacity




Raw Water treated

Greater than

Water into network

Greater than

Domestic Water sold

Un-domestic water sold




Number of Connections




People per connection




Responsible area population

















































C 2.1




C 2.4







C 2.3.




























Production utilization of capacity




Water Treatment Plant efficiency







NRW


























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