More than a year and a half has passedsince International Finance Corporation (IFC) AdvisoryServices in Eastern Europe and Central Asia (AS ECA)introduced a standard methodology for assessing aggregatecost savings (ACS) for businesses resulting fromIFC-supported business enabling environment (BEE) reforms.Within the region, thirteen regulatory reforms in sixcountries have been assessed with this methodology, showingan estimated $301 million in cost savings for the privatesector with an average impact of $29 for every dollar spenton these advisory projects. These results look impressive,but they also raise questions on the concept and applicationof the methodology: How do the authors know this is adequateimpact for the resources invested? What else needs to bedone to refine the approach? Can these types of impactmeasures be applied as decision tools at the program level?On a global level, a review of project supervision reportsfrom the current active BEE portfolio reveals that fifteenprojects are reporting on the corporate-wide standard ACSindicator. Thus, another question emerges: What does it taketo implement a consistent approach across regions?