The purpose of this research is to find out the implementation of just in time through value stream and inventory toward lean service performance. This research is located in RSUD Arifin Achmad Provinsi Riau Jl. Diponegoro No.2 Pekanbaru. The type of data in this research is quantitative, that processed from perceptions of respondents. The data in research are primary and secondary data, the nu…