Evaluation Index System of Cloud Service and the Purchase Decision- Making Process Based on AHP

Aiming at the problems existing in the current study on cloud service purchase decision, especially the evaluation index system is inadequate, as well as the quantification of qualitative indexes is often neglected. To make a more rational evaluation of cloud service, firstly, this paper proposes a complete cloud service evaluation index system; Secondly, it solves the sort-order problem of evaluation indexes priorities with analytic hierarchy process (AHP); At last, the quantitative models of qualitative indexes are also developed, which makes the purchase decision of cloud service become more scientific and convincing.