MODELING FOR ENHANCING RELIABILITY OF MANUFACTURING SYSTEMS

Goal – This study proposes an integrated model for improving equipment availability in maintenance management by considering the relationship between Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR). These indicators are typically evaluated individually for decision-making in maintenance management. Methodology – The proposed integrated method uses widely adopted tools in industrial management, such as reliability statistical analysis, Lean Manufacturing, M-VSM (Material and Value Stream Mapping), FMEA (Failure Mode and Effects Analysis), and criticality analysis. Results – The proposed integrated method has proven effective after implementation in the fertilizer industry, increasing the availability of the prioritized equipment as determined by reliability statistical analysis. The improvement in equipment availability was achieved through a 15.5% reduction in MTTR and a 20.6% increase in MTBF, assuming the correct application of the proposed tools. Limitations – The article was limited to investigating the MTBF and MTTR indicators, as the determination of MTTF was impossible due to data unavailability. Practical implications – The article results can be used as a reference for the strategic decision making in maintenance management within industry. Originality – The study presents the modeling of an integrated method that utilizes consolidated tools and validates it through a case study, demonstrating practical results in a company.