1. GICONSIME Research Group, Dept. of Construction and Manufacturing, Univ. of Oviedo, 33203 Gijón, Spain.
2. Associate Professor, Dept. of Energy, Univ. of Oviedo, 33203 Gijón, Spain.
3. Professor, GITECO Research Group, Dept. of Transport and Project Management, Univ. of Cantabria, 39005 Santander, Spain.
4. Associate Professor, Dept. of Construction and Manufacturing, Univ. of Oviedo, 33203 Gijón, Spain.
5. Full Professor, Dept. of Construction and Manufacturing, Univ. of Oviedo, 33203 Gijón, Spain (corresponding author).