By Diana Mosher Iterative design standards help drive a healthy built environment Target Designing environmentally friendly interiors has become the norm-but, how we define success continues to be a moving target. The latest standards go beyond attributes of the built environment to focus on the wellbeing of occupants. Rating systems are intended to help the A&D community adhere to agreed upon parameters and enable outcomes to be measured. But, with so many to choose from- and updated versions rolled out all the time-some designers admit they have become overwhelmed. Here, we take a look at three standards that are among those most talked about today, and discuss the details that set them apart. i+D - September/October 2019 39