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L6S Maintenance Team, Samarco Mining, Belo Horizonte, Minas Gerais, Brazil

This team used DMAIC methodology to reduce maintenance downtime in conveyor belts due to loading system misalignment and roller changes. SIPOC, Pareto, 5 Whys, RCA, process map, prioritization, and effort-impact matrices resulted in the system operating at maximum capacity with an increase in revenues of US$2.6 million. There was also a reduction of downtime from 13.4 to 2.03 hours/month, reduction of corrective maintenance up to 90%, and improvement in contractors' SLAs to 93%.

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