The implementation of lean construction still faces barriers mainly in its initial stages. It occurs, in part, due to the lack of evaluation tools that enable the acknowledgment of its true value for the companies.Thus, this paper aims to present an audit protocol to evaluate the level of lean implementation. Developed under Design Science methodological background, the audit protocol was proposed based on literature. To evaluate the applicability, the pilot protocol was implemented and tested into 4 construction companies from the city of Fortaleza, northeast of Brazil. The pilot revealed improvements to improve the protocol. Then, the improved protocol was evaluated and validated by 5 lean construction experts, resulting in the final protocol which was composed by 4 dimensions, 35 categories, 136 items and 223 examples of verifying evidences.Was verified that the protocol allows more than identify the lean implementation level, but enables a lean journey if used as a guidebook to lean implementation. The proposed audit protocol can be also used to cyclic evaluation that enables the improvements of the identified gaps, through a deep comprehension of the critical factors that can prevent the success of lean construction in the companies.
O planejamento do canteiro afeta diretamente a produção, este deve levar em conta vários fatores que maximizam a produtividade e minimizam os custos de produção. O layout do canteiro ao longo da obra é um problema cotidiano no planejamento da produção. Este trabalho propõe um método simplificado para o posicionamento ótimo dos elementos de um canteiro, a fim de reduzir a distância de transporte, utilizando um modelo suportado por planilhas eletrônicas e algoritmos de otimização genética. O modelo proposto foi aplicado para resolver um problema de referência. O resultado foi um canteiro com 0,25% menos distância de transporte do que a referência que já havia sido otimizado. Portanto, sugere-se a implantação deste método para potencializar o planejamento do canteiro em seus estágios iniciais.
Construction projects need to consider the multiplicity of constructive aspects on its development process via predefined parameters. Constructability is a concept that comprehends these features, and has a direct relationship with time, cost, and quality criteria. However, it is often neglected due the difficulty in measuring its indicators during project design process. Additionally, the indicators measurement is usually laborious, resulting in waste of resources during design stage. Recognizing this scenario, this research proposes a practical tool for designers and integrated with a design software. One of the steps of the model is the identification of project performance indicator's regarding its constructability. Following is the development of a programmable routine, created on Dynamo, used for the data collection from the BIM model. The indicators are updated in real time, granting project constructability evaluation during the modelling process. The alghorithm developed allows users to propose solutions that are almost impossible when using only a modeling software and that would require many operations. Some limitations that were identified are: the developed routines may not support unforeseen variations and since the model was built with a visual programming tool (Dynamo), it may have to undergo some adaptations for correct efficiency in other tools.
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