Reduction of downtime loss by using reliability theory based preventive maintenance: a case study of the concrete industry

The purpose of this research was to reduce downtime loss because of immediate machine breakdown in the process. This problem is caused from an inappropriate preventive maintenance plan. The research methodology applies reliability engineering theory for analyzing the replacement period which can improve the preventive maintenance plan. According to the result, a preventive maintenance plan based on the reliability theory results in downtime loss because of breakdown in concrete mixer machines reduced from 865.33 minutes / month to 301.67 minutes / month and the availability rate can be increased from 88.48 percent to 95.82 percent.