Fuzzy Logic Model for Selection of Vertical Formwork Systems

Abstract

Formwork systems have a considerable share in building construction costs. Accordingly, selecting an appropriate formwork system that respects project individualities plays an important yet challenging role in achieving significant cost savings. In Egypt, current practice in formwork selection primarily uses the subjective decisions of site engineers. This paper presents a fuzzy logic-based model that supports decision makers in selecting the appropriate vertical formwork system for projects. Ten commercial vertical formwork systems commonly used in Egypt are identified with the most important factors affecting their selection. The data were tabulated to serve as a knowledge-based system (KBS) to guide site engineers in selection. On the basis of the KBS, a fuzzy logic model with five input variables, representing the governing factors, is then developed to automate the selection process. The model is tested by applying it on a real-life case study. Results are acceptable and show a promising role for fuzzy logic in formwork selection. DOI: 10.1061/(ASCE)CO.1943-7862 .0000490. © 2012 American Society of Civil Engineers. CE Database subject headings: Fuzzy sets; Construction management; Construction costs; Formwork (concrete construction). Author keywords: Vertical formwork system; Fuzzy logic; Construction engineering; Knowledge-base.