Increasing the effectiveness, efficiency, and compliance of public procurement (PP) has become an ongoing concern for governments. Public administrations at different levels are realising that – in order for PP to fulfil its mission – appropriate control and diagnostic systems must be put in place. This study aims to investigate the architecture of PP performance measurement systems (PP-PMSs) in local governments, drawing on four case studies from Italy and four from Wales. The theoretical background is provided by the emerging literature on procurement PMSs in the private context as well as the specific literature on the public sector. PP-PMSs are specifically analysed with respect to performance areas covered (i.e., cost, quality, time, compliance, innovation, sustainability). Results show that performance dimensions should be extended beyond traditional cost measures, with KPIs not limited to those imposed by national/regional regulation. Furthermore, we show that this is likely to happen where the procurement function is recognised as strategic in the public institution.