View source for MCDA methods in decision making

=== CBA ===
Cost - Benefit Analysis (CBA) is a tool that is essential in order to support the decision-making process. A CBA consists of quantitative data of a project, that being the enumeration and valuation in monetary terms of every cost and benefit of that project. The main result of a CBA is the Net Present Value, which in case of being positive, means that the benefits exceed costs over the project's lifetime. So, naturally, the goal is to reach a positive Net Present Value. <br />
This method is recommended when there are not any assets or effects of the decision making that do not involve money or are not assigned a monetary value. The CBA considers different values such as discount rate or consumer surplus, which helps to reach much more precise and realistic results, especially for projects who have a considerable life span or, specifically in engineering projects, have had a long construction period. <br /> <br /> 
Furthermore, CBA can be complemented with the MCDA, making use of the qualitative data involving the project and improving the outcome of the decision and lastly, the project itself.