▁sust ain ability ▁issues ▁ ▁to ▁guide ▁collabor ative ▁dialog ue ▁ ▁to ▁present ▁complex ▁concepts ▁quickly ▁and ▁effectively ▁to ▁development ▁teams ▁and ▁decision - m akers ▁ ▁The ▁framework ▁consists ▁of ▁three ▁" l enses ": ▁Found ational ▁L ens , ▁As pect s ▁of ▁Place ▁L ens ▁and ▁Flow s ▁L ens . ▁The ▁l enses ▁work ▁together ▁to ▁guide ▁the ▁design ▁process , ▁emphas izing ▁the ▁gu iding ▁principles ▁and ▁core ▁values , ▁understanding ▁the ▁del icate ▁relationship ▁between ▁building ▁and ▁place ▁and ▁how ▁elements ▁flow ▁through ▁the ▁natural ▁and ▁human ▁systems . ▁ ▁Per kins + Will ▁ ▁Per kins + Will ▁is ▁a ▁global ▁architecture ▁and ▁design ▁firm ▁with ▁a ▁strong ▁focus ▁on ▁sust ain ability ▁- ▁by ▁September ▁ 2 0 1 2 ▁the ▁firm ▁had ▁completed ▁over ▁ 1 5 0 ▁LE ED - cert ified ▁projects . ▁It ▁was ▁at ▁the ▁ 2 0 0 8 ▁Health care ▁Center ▁for ▁Ex cell ence ▁meeting ▁in ▁V ancouver , ▁British ▁Columbia ▁that ▁the ▁decision ▁was ▁made ▁to ▁develop ▁a ▁reg ener ative ▁design ▁framework ▁in ▁an ▁effort ▁to ▁generate ▁bro ader ▁conversation ▁and ▁inspir ational ▁ideas . ▁Later ▁that ▁year , ▁a ▁reg ener ative ▁design ▁framework ▁that ▁could ▁be ▁used ▁by ▁all ▁market ▁se ctors ▁including ▁health care , ▁education , ▁commercial ▁and ▁resident ial ▁was ▁developed ▁by ▁Per kins + Will ▁in ▁conj unction ▁with ▁the ▁University ▁of ▁British ▁Columbia . ▁The ▁framework ▁had ▁four ▁primary ▁object ives : ▁▁ ▁to ▁initi ate ▁a