Software organizations have increased their interest on software process improvement (SPI). In high maturity levels, SPI involves implementing statistical process control (SPC), which requires measures and data that are suitable for this context. However, this has been pointed in the literature as one of the main obstacles for a successful implementation of SPC in SPI efforts. This paper presents an instrument for evaluating the suitability of measurement repositories in order to support software organizations implementing SPC. Categories and Subject Descriptors D.2.8 [Software Engineering]: Metrics