Abstract
Sgraffito is an ancient decorative technique applied in walls, produced by using layers of cement plaster tinted in contrasting colours to a moistened surface. This decoration originated in Italy and has been expanded in different European cities or villages. Nowadays, this decoration technique has almost disappeared because of decomposition, inexperience, or lack of knowledge. The preservation and restoration of the sgraffito technique is the most challenging and vital task of cultural heritage buildings’ preservation. Consequently, the conservation of sgraffito depends not only on the historical and architectural knowledge, studies, and conservation projects of the cultural heritage buildings, but also demands the experience, proper qualification, and knowledge of the contractor. This paper presents six principal criteria. Three possible variants for contractor selection for sgraffito decoration of cultural heritage buildings are proposed, and six principal criteria for their evaluation are suggested. The research employs the Analytic Hierarchy Process (AHP), SWARA (Step-Wise Weights Assessment Ratio Analysis), and WASPAS-SVNS (Weight Aggregated Sum Product Assessment-Single- Valued Neutrosophic Set) methods.
Highlights
A large number of researchers have presented many studies on contractor selection in the construction industry
Green contractor selection was presented by Zhang et al [15], developing interval-valued dual unsure fuzzy doubtful unbalanced lingual set model, which is based on DEMATEL (Decision-Making Trial and Evaluation Laboratory) and TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution) approaches
This paper presents the Analytic Hierarchy Process (AHP), SWARA, and WASPAS-SVNS methods for the contractor selection process for sgraffito decoration of cultural heritage buildings (Figure 5)
Summary
A large number of researchers have presented many studies on contractor selection in the construction industry. One of the commonly visible techniques in cultural heritage buildings is sgraffito decoration This technique is an ancient decorative technique applied in walls, produced by using layers of cement plaster tinted in contrasting colours to a moistened surface. Sgraffito techniques’ conservation and restoration depends on the historical and architectural knowledge, studies, or conservation projects of the cultural heritage buildings, and requires additional liability, ability, attention to technology for decoration and materials used, and qualified and experienced employees. The choice of a suitable contractor for heritage preservation and restoration performance is a very complex task for clients in construction management. Contractor selection in construction management mainly focuses on the project on schedule, within budget, and with the demanded quality [1]. Three possible variants for contractor selection for the sgraffito technique of cultural heritage buildings are proposed, and six principal criteria for their evaluation are suggested. The research employs the Analytic Hierarchy Process (AHA), SWARA, and WASPAS-SVNS methods
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