“…Most of the reviewed work deals with aspects and metrics to support the first four phases based on design-time data: Metrics to measure busi-ness alignment of SOA implementations [1,30], procedures to model [6,16] and implement SOA [3], including the prediction of development effort and implementation complexity early in the design phase [37]. Metrics to measure granularity, complexity and reuse [15,35,36], performance [5,13] and QoS [28,31] of SOAbased services also rely on design-time data. Most work on operation and optimization has been done on how to handle service level agreements primarily based on design-time data: how to formally describe them [19,34,39,40], technically implement, test and enforce them [4,10,15,17,18,23,25,26,32,33,42,44,45] or how to monitor them [2,20,21].…”