As this was the first airport PPP project in Colombia that was based on the PPP law passed in 2011, KPIs linked to revenue were introduced for the first time. Previous concessions did not have similar KPIs, which consequently created some challenges for the Project Company in terms of its ability to adapt to the new performance standards. For example, the same KPI measurements were applied during both the full, steady-state operations and the construction period. The Procuring Authority considers that in future PPP contracts, the KPI measurement methodology should be differentiated between construction and operation in order to take into account the challenges of operating and expanding the airport at the same time. This is explained further under the heading "Performance Monitoring and KPIs".