Presently, in the water supply sector (both urban and rural) and, more generally, rural development, this method insists on the holistic understanding of the project's issues.

A systemic approach takes into consideration side-effects and properly evaluates the consequences of the propositions according to factors previously considered as external to the intervention.

Technical diversification, associated to geographical diversification of the consultant allows him to embrace the issues of development with a more comprehensive and objective view.

But the cost-efficiency constraints of the competitive market require swiftness and pertinence skills.