Alistair G. Sutcliffe John Karat Susanne Bødker Bill Gaver Can we measure quality in design and do we need to? 119-121 2006 conf/ACMdis/2006 Conference on Designing Interactive Systems http://doi.acm.org/10.1145/1142405.1142425 db/conf/ACMdis/ACMdis2006.html#SutcliffeKBG06