Variabilidade do tempo no sistema construtivo em aço e a tendência dos sistemas industrializados

Resumen

One of the main challenges faced by the construction management is implementing activities on schedule, to avoid variability. This research aims to identify the causes of variability in steel constructions and compare their results with the literature. The method consisted of multiple case study with direct observations at six construction sites. A questionnaire with 31 causes of variability divided into categories was applied to construction workers to detect the frequency and intensity of delays. To obtain the results, the causes were grouped into risk levels using cluster analysis. In addition, an index called Delay Factor was used. Research has shown the eight main causes of variability in steel constructions. Statistical analyzes showed similarities between steel construction and other industrialized systems, such as: the most industrialized systems had less impact of process variability. Similarities were among the main causes of steel construction and concrete walls, in which the majority of the causes were related to the group work prerequisites, justified as peculiarities of industrial systems.