Expert assessment of the impact of factors on the quality costs of facade systems

The article presents the results of own research on the costs of quality of aluminum-glass facades and ventilated facades from the perspective of Polish production and assembly companies. The main aim of the research was to collect information on the impact of the identified 22 factors on the quality costs associated with the implementation of facade systems. The research used an expert survey method. The selection of the research sample was non-random. Survey questionnaires were addressed to 65 respondents, including: constructors/designers, construction managers or engineers, assembly managers, production department employees, cost estimators and other specialists related to the production and installation of facade systems. The return of completed surveys was 41 (63.08%). The survey form was divided into two parts. The first part aimed to collect information about the respondents’ experience. The main part of the form focuses on issues related to the costs of quality of aluminum and glass facades and ventilated facades. Respondents were asked whether the proposed 22 factors can actually affect the quality costs of implementing facade systems. Positive responses were received. Moreover, respondents were asked to assess the degree of importance of the impact of the mentioned factors on the quality costs of constructed facades and ventilated facades. For this purpose, a five-point Likert scale was used, where 1 means very low influence and 5 means very high influence. Based on the results obtained, an average rating was determined for each factor, and then each of the 22 factors was ranked according to the degree of importance. Respondents indicated that the following factors have the greatest impact on the quality costs of facade systems: assembly errors (average factor rating = 4.22), design errors (4.00) and complaints (3.83).