For each programme, monitoring and evaluation mechanisms are set up to assess their impact on the ground and the cost-effectiveness of their implementation. For the water and sanitation progranunes, such indicators include service provision performance (number of litres per second, number of sewer connections, etc.), The difficulties encountered by some concession contracts with large multinational companies were due to a range of problems, such as incomplete initial sustainability assessments, poorly designed tender processes and contractual arrangements, and inadequate regulatory frameworks.