The need for an information technology system that is adaptive to business change, encouraging many companies to provide the optimal quality of information technology systems. XYZ CORP. is a managed service provider company, currently has problems in providing device accreditation services. Device accreditation service is a testing service of information technology devices. The purpose of this study is to establish the priority of process improvement in the presentation of device accreditation services. To overcome this problem, this research uses CMMI-SVC framework with continuous representation. There are 4 stages: rating of company needs, process area ranking in line with company requirement, capability evaluation in selected area process and priority of recommendation of improvement. The company needs assessment and process area ranking is determined using correlation matrix QFD. Then evaluated the process area with SCAMPI-C tools. It was found that the five selected process areas have not run all specific practice so that it only has level 0 capability level. Recommendation determination using pareto analysis to get recommendations that solve problems in process of service accreditation service significantly. The recommendations resulted in the design of procedures for device accreditation services.