Application of the Six sigma method for quality management of concrete works in construction

Introduction. Focus of the review is the application of statistical methods of product quality management to the analysis of the quality of concrete structures. TThe relevance of the chosen topic is substantiated by the fact that, under conditions of dynamic construction, it is necessary to optimize the execution timelines of key construction processes while maintaining the quality of the constructed structures. The application of the Six sigma method in the production of concrete structures is considered, where there is a wide range of possible defects (cracks, braces, verticality deviation, etc.), which have a significant impact on the quality and safety of buildings and structures. Methods and materials. The Six sigma methodology optimizes processes to reduce the risk of defects and improve product quality. Quality management based on this method allows you to optimize the schedule of work, eliminate delays and downtimes and reduce labor costs. The tables of main defects have been compiled, values of Six sigma for various combinations of the volume of concrete structures and the corresponding number of defects are calculated. The main method of process improvement is the DMAIC cycle (definition, measurement, analysis, improvement, control). Considered each stage of the cycle for concrete works in construction. The implementation of the adapted Six sigma methodology has been carried out to monitor the quality level of the construction of a concrete framework with improvements in organizational and technological processes according to the DMAIC cycle. Discussion and conclusion. The method Six sigma obtained from the results of the study allows for quality assessment of the production of concrete structures at various objects. The reliability and objectivity of this method as a tool for monitoring the quality of concrete works has been confirmed. Based on the obtained quality assessment, the effectiveness of the application of improvements to the DMAIC cycle is justified. The implementation of the study confirms the conclusion that the quality management of concrete works has improved through a combination of monitoring quality according to the Six sigma method and improvement of construction production according to the DMAIC cycle.