## 8 Evaluation of Alternatives  
The selection of the most optimal and efficient alternative has been carried out using a multicriteria analysis tool. Energy, social, economic and constructive viability criteria have been proposed, with a weight of 40%, 15%, 10% and 30%, respectively, in the final decision. Within each of these criteria, each alternative will be measured with a numerical scale to know how appropriate the solution is. Solutions considered very bad obtain the minimum score (0) and those considered as optimal obtain the maximum score (10), as shown in Table 12. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c} \hline  & & \multicolumn{4}{c}{**Energetic Behavior**} & \multicolumn{4}{c}{**Social Aspect**} & \multicolumn{4}{c}{**Economic Aspect**} & \multicolumn{4}{c}{**Constructive Aspect**} & \multicolumn{1}{c}{**Total**} \\ \cline{3-14}  & & **Net** & **Crapacity** & **Factor** & **Valee** & **Meet the Demand** & **Value** & **Investment** & **Value** & **Acceptable** & **Value** & **of Favorable** & **Value** & **of Favorable** & **Value** & \\  & & **(MW/Ven)** & & **(\%)** & & **(\%)** & & **(\%)** & & **(\%)** & & **(\%)** & & **(\%)** & & **(\%)** & \\ \hline \multirow{4}{*}{**OWC**} & **Panta** & 97 & 7 & 26 & 8 & 85 & 8.5 & 23 & 8 & Yes & 10 & Low & 0 & 5.4 \\  & **Langetiera** & 96 & 5 & 27 & 10 & 41 & 4.1 & 16 & 10 & Yes & 10 & Average & 6 & 7.0 \\  & **Panta** & 99 & 6 & 26 & 9 & 18 & 1.8 & 19 & 9 & Yes & 10 & Average & 5 & 6.3 \\ \hline \multirow{4}{*}{**SSG**} & **Panta** & 284 & 10 & 24 & 7 & 100 & 10 & 28 & 5 & No & 0 & Low & 0 & 5.6 \\  & **Langetiera** & 111 & 8 & 10 & 5 & 27 & 2.7 & 24 & 7 & No & 0 & Average & 6 & 6.2 \\  & **Panta** & 183 & 9 & 16 & 6 & 27 & 2.7 & 25 & 6 & Yes & 10 & Average & 5 & 6.1 \\ \hline \multirow{4}{*}{**OWC**} & **Weight** & 25\% & & 15\% & & 10\% & & 20\% & & - & & 30\% & \\ \cline{1-1}  & & & & & & & & & & & & & & \\ \end{tabular}
\end{table} 
Table 12: Multicriteria analysis for alternative evaluation. First of all, two relevant aspects are considered in the energy criteria: the net energy production, which has been considered per device unit in order to assess its efficiency in terms of generation, and the capacity factor as this index shows the real use of the facility over time reveals how production losses really affect to the plant (maintenance, energy transformation losses, among others). Secondly, as these types of projects need to be accepted by society in order to not stand against the project and then halt all works, social criteria need to be considered. An incentive for society and politicians is to know if the production of the facility will cover all of its long-term consumption to be considered energy self-sufficient. This has been determined with the length of the control panel and the number of devices to be installed (see Section 5). Furthermore, an approximate economical estimation of each alternative has been developed, taking into account the cost of the materials used for each of them, including waste management and the wiring installation. Regarding orders of magnitude, Table 13 shows some of the prices that are considered, to estimate the initial investment. This economical approach is based on the market prices and special specifications for works contracts in maritime infrastructures in Spain. Given the amount of material to be managed as construction waste from either the removal of blocks removed from the main mantle or the dismantling of material form the concrete superstructure, the waste management will be valued at a percentage of 1.5% of the material execution budget, according to the experience in this type of construction. Last but not least, the constructive viability depends on the temporary window of one year established as well as the probability of favorable climatic conditions. Due to the need of wave heights below a certain value for the compatibility of maritime equipment, it is qualitative valuated the risk of having unpleasant weather that can delay many of the constructive activities to be carried out.