As a rule, not very often. Here’s one that breaks the rule: the level certification for furnishings. It’s something all members of the industry trade group BIFMA agreed on and published as the e3 sustainability standard. The standard’s goal is to give everyone a consistent, easy way to compare the sustainability of furniture products. Watch the video for more about level and why Herman Miller’s CEO Brian Walker thinks it’s so important. By the way, 80% of Herman Miller’s products are certified under the new standard.