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All furniture lines go through a rigorous testing process. Here we see a line of task chairs undergoing what's called the "loaded, pull-back" test. Each seat is topped by 250 lbs of weight, and the chair is pulled into recline position, over and over, with an additional 150 lbs of force. The certification standard for BIFMA (Business and Institutional Furniture Manufacturers Association) as a 'commercial grade chair' requires a product to successfully complete 150,000 cycles; the Herman Miller self-imposed standard is 1,000,000 cycles.  Inside the Herman Miller Headquarters by Amanda Dameron
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