Shared Service Center's (SSC) are important and complex organizational models that occupy a central place in multinational companies' attention. Recognizing that previous studies produced rich albeit fragmented insights, we aim to synthesize these findings and develop a two-dimensional SSC framework. In essence, this metasynthesis extracts, analyzes and synthesizes qualitative case study findings to elucidate determinants that influence SSC outcomes and decisions. In line with economic, strategic, and socio-organizational theories, we capture findings as pairs of independent and dependent variables. Results show that a large number of independent variables, aggregated in 13 categories, affect 41 dependent variables of SSCs. Our findings contribute to understanding SSC effect-relationships that supports the building of theories about SSC phenomena in future research.