“…Answering RQ2, we identify two basic purposes of the presented models: providing a reference and guidelines for those participating in various roles in the software development life cycle in order to help them attain the qualities of sustainable software products and processes (we call them reference models) [7,[16][17][18][19]22,23,[25][26][27][28][30][31][32][33][34]36,38,46,49,53], and providing methods, measures, and tools that can be applied to verify whether given software products and processes can be considered as green or sustainable (we call them evaluation models) [17,[19][20][21]24,26,29,30,32,33,35,37,[39][40][41][42][43][44][45]47,48,[50][51][52]54,55]. Six am...…”