Improve Efficiency of Production Line Painting Areas in Transportation Equipment Products Mining Through Standard Specifications and Ranked Weighted Position (RPW) Line Balancing Methods

The growth of coal is currently experiencing a very significant increase. This has resulted in higher demand for mining equipment, companies in the field of mining equipment manufacturing processes are competing to make mining transportation equipment products with good quality, timely delivery of products and competitive prices. The speed of the production process will increase the productivity of a production line. This competition must be supported by the smooth production process, where there should be no waste in each production line. One of the mining equipment manufacturing companies found ineffectiveness, namely bottlenecks in the painting line production painting area. The ineffectiveness after lines identified is based on over specification which results in over production so that there is an ineffective production line. With reference to the use of painting material specifications through the ISO12944-5 reference and with the Line Balancing Ranked Position Weight (RPW) method. The painting production line has improved, this can be seen based on lead time (LT) data has increased by 52.86%, Total delay has decreased by 85.78%, reducing the number of workstations from 6 workstations to 4 work stations, cycle time reduced by 25%, balance delay reduced to 58.94%, line efficiency increased to 26.52%, Smoothness Index decreased to 82.82% to be better.