40
4 Sefficiency (Sustainable Efficiency)
this chapter fulfils this requirement and if followed properly produces sustainable
solutions.
Sefficiency includes economic, environmental and social concerns in its formulation, which makes it a sustainable efficiency indicator for the management of a
WUS. However, “sustainability is not a scientific concept, but rather a social goal.
It implies an ethic. Public value judgments must be made about which demands
and wants should be satisfied today and what changes should be made to ensure
a legacy for the future. Different individuals have different points of view, and it
is the combined wisdom of everyone’s opinions that will shape what society may
consider sustainable” (Loucks 2002). This needs transparency and the involvement
of all the stakeholders (see Sect. 3.2), because to become sustainable is complex.
The quote also refers to “public value judgments”, which should be scientifically
bounded (Sect. 1.2) as much as possible in order to produce solutions that are more
robust for the integrated three Pillars. “In addressing the priority problem the task is
that of reducing and not of eliminating entirely the reliance on intuitive judgments”
(Rawls 1999). Even though our “priority problem” is different, but the statement
also applies to Sefficiency, meaning that it reduces and constraints value judgments
significantly.
Before continuing to the proof of Sefficiency, let us present a non-exhaustive list
of its possible benefits:
• Enables transparency through the fixed structure of the WUS
• Enables stakeholders involvement for each WPI and its quality and benefit Pillars
• Minimizes the risks of water scarcity
• Adapts to uncertainty (e.g., climate change, population)
• Lessens impact of severe conditions (e.g., drought)
• Protects environment
• Reduces new infrastructure
• Saves energy
• Decreases cost
• Rationalizes investments
• Supports economic growth
• Creates jobs
• Improves cost effectiveness of water service
• Allocates water better
• Enhances conditions for recreation.
4.1 Proof of Sefficiency Indicators
In general, there exists both input and output efficiencies for any system (Coelli et al.
2005) in order to reveal the complexity of its structure and behaviour. Sefficiency
equations compute the performance of a WUS from the supply and demand sides
(FIW5c). The former is relative to inflow and the latter to consumption, which is
a very important part of outflow (FIW2). This proof is based on Haie and Keller
4 Sefficiency (Sustainable Efficiency)
this chapter fulfils this requirement and if followed properly produces sustainable
solutions.
Sefficiency includes economic, environmental and social concerns in its formulation, which makes it a sustainable efficiency indicator for the management of a
WUS. However, “sustainability is not a scientific concept, but rather a social goal.
It implies an ethic. Public value judgments must be made about which demands
and wants should be satisfied today and what changes should be made to ensure
a legacy for the future. Different individuals have different points of view, and it
is the combined wisdom of everyone’s opinions that will shape what society may
consider sustainable” (Loucks 2002). This needs transparency and the involvement
of all the stakeholders (see Sect. 3.2), because to become sustainable is complex.
The quote also refers to “public value judgments”, which should be scientifically
bounded (Sect. 1.2) as much as possible in order to produce solutions that are more
robust for the integrated three Pillars. “In addressing the priority problem the task is
that of reducing and not of eliminating entirely the reliance on intuitive judgments”
(Rawls 1999). Even though our “priority problem” is different, but the statement
also applies to Sefficiency, meaning that it reduces and constraints value judgments
significantly.
Before continuing to the proof of Sefficiency, let us present a non-exhaustive list
of its possible benefits:
• Enables transparency through the fixed structure of the WUS
• Enables stakeholders involvement for each WPI and its quality and benefit Pillars
• Minimizes the risks of water scarcity
• Adapts to uncertainty (e.g., climate change, population)
• Lessens impact of severe conditions (e.g., drought)
• Protects environment
• Reduces new infrastructure
• Saves energy
• Decreases cost
• Rationalizes investments
• Supports economic growth
• Creates jobs
• Improves cost effectiveness of water service
• Allocates water better
• Enhances conditions for recreation.
4.1 Proof of Sefficiency Indicators
In general, there exists both input and output efficiencies for any system (Coelli et al.
2005) in order to reveal the complexity of its structure and behaviour. Sefficiency
equations compute the performance of a WUS from the supply and demand sides
(FIW5c). The former is relative to inflow and the latter to consumption, which is
a very important part of outflow (FIW2). This proof is based on Haie and Keller