Golshid Gilani , Oriol Pons, Albert de la Fuente

1. Institute of sustainability, UniversitatPolitècnica de Catalunya (UPC), Barcelona, Spain. Golshid.gilani@upc.edu Department of Architectonic Structures I, Universitat Politècnica de Catalunya (UPC), oriol.pons@upc.edu Department of Civil and Environmental Engineering, UniversitatPolitècnica de Catalunya (UPC), albert.de.la.fuente@upc.edu Golshid Gilani , Oriol Pons, Albert de la Fuente Towards The Façades of the Future: A New Sustainability Assessment Approach

2. TABLE OF CONTENT • Introduction • Objective • Methodology • Preminilary Results 1172

3. International Rating Tools 1172

4. Performance assessment methods consider buildings as a whole and assess the sustainability performance of the whole building Rating systems are not universal. they are typically designed with one country and applied to other areas as well. While they are not adjusted to take into account the local climate or cultural differences. DEFICIENCIES Only a few methods are capable of quantifying all social, economic & environmental aspects to derive a global sustainability when a sustainability assessment requires a specialized tool for a particular study case, the aforementioned tools are scarcely representative 1172

5. OBJECTIVES developing a systematic model based on MIVES for assessing the global sustainability index of different façade systems and supporting decision-makers in selecting the most preferable alternatives Optimized solution Decision making Sustainability Residential Façade 1172

6. METHODOLOGY MIVES (Integrated Value Model for Sustainable Assessment) aMulti- Criteria Decision Making (MCDM) that incorporates the concept of value function Value Functions is based on the satisfaction grade of the stakeholders Designed Model Simplified LCA AHP MIVES 1172

7. It is unique among other MCDMmethodsbecause it is based on the use of value functions and utility theory concept for assessing the satisfaction of the different stakeholders applying AHP for assigning weights to organize the process efficiently to reduce the model complexity and subjectivity WHY MIVES this model has already been successfully applied in various studies related to different fields of architecture & civil engineering Flexible model : it can be calibrated to a certain time period and applied for different areas with varied local living standards and characteristics by adapting the indicators and weights in the tree. 1172

8. 1 defining the target establishing the requirement tree 2 Establishing the value function for each indicator Making The Best Decision MIVES-BASED Approach 3 assigning weights to all parameters 4 determining the sustainability index of each alternative 5 1172

9. 1172

10. Preliminary results 1172

11. Requirement tree I Identifying the most representative criteria for sustainability assessment of residential façades 1172

12. 1172

13. Value function II 1172

14. Stage 1. Definition of the tendency (increase or decrease). Stage 2. • Definition of the points corresponding to Xminand Xmax. Stage 3. Definition of the shape of the value functions (linear, concave,convex,s-shape) Stage 4. Definition of the mathematical expression of the value function 1172

15. Value Function Of heat transfer Indicator; opaque part w/m2k • National regulation and standards • CTE DB-HE1 2013 1172

16. III Application of MIVES: Multifamily Residential Building 1172

17. Sustainability index (I), requirements value (VRk ), criteria value (VCk ), indicators value (VIk) 1172

18. Summery indicators of a sustainable façade + MIVES: assessing and forquantifying the sustainabilityof various types of façade and choosing an optimized solution in terms of sustainability.selection of a facade system is a multi-criteria and multi-participant challenge and satisfaction of the stakeholders have to be considered to ensure the project success. this model could give researches and decision makers the opportunity to achieve this goal. flexible model 1172

19. Golshid Gilani g.gilani2015@gmail.com 1172