3. Our findings suggest that the notion of ‘‘periodic review’’ as discussed in the literature could be further refined. The review of the metrics themselves is a difficult effort. In our study it was considered worthwhile to invest significant resources in developing a standardized, shared set of performance metrics to be used across the supply chain. On the other hand, reviewing and improving the reports and scorecards could be done on a continuous basis. The selection of individual metrics, the way in which metrics are clustered, the hierarchical ordering of clusters, and the way of presenting the reports are all aspects that are easily changeable from one month to the other (or other reporting intervals). We suggest that every time when a supply chain management team is reviewing a performance report, these users may also provide feedback on the report itself, directly to the person responsible for that report. In this way the development of the PMS becomes a continuous effort, based upon a far less frequently changed basis of standardized metrics.