Avaliação do planejamento e controle da produção de estruturas metálicas pré-fabricadas : um estudo de caso

Abstract

Companies that manufacture prefabricated steel structures operate in a production environment characterized by a high level of interdependence among engineering, planning, and manufacturing, which makes production planning and control a central element for operational performance. In this context, the lack of integration among these stages may compromise production predictability and efficiency, regardless of the structural typology or the degree of complexity of the components. Accordingly, this study sought to address the following research problem: how does the lack of integration between planning and execution, resulting from the absence of a structured production planning and control system, affect the productive performance of a company that manufactures prefabricated steel structures? The main objective of this study was to critically evaluate the Production Planning and Control applied to the manufacturing of prefabricated steel structures, based on the analysis of productive performance through the S-curve. The specific objectives were to characterize the company under study, map its production processes, measure production performance, and identify factors associated with deviations between planned and executed values. This research is classified as applied, exploratory-descriptive, and retrospective, with a quantitative approach, and was developed through a case study conducted in a metallurgical company located in the state of Ceará, Brazil. Six prefabricated steel structure projects executed between September 2021 and April 2022 were analyzed, using planning, production, and dispatch data. The methodology involved direct observation, documentary analysis, and the construction of S- curves, enabling a comparison between planned and executed values in terms of cumulative weight; the consolidated data are presented in Appendix C. The results revealed recurring deviations between planned and executed values in all analyzed projects, indicating productive performance below expectations, with no predominant influence of structural typology or component complexity. From a qualitative perspective, it is concluded that low productive performance is mainly associated with the lack of integration among engineering, planning, and execution stages, resulting from the absence of a structured production planning and control system, which compromises production predictability and efficiency.