To implement its work and to make the most efficient use of in-house resources, the EIB-CM regularly calls upon the assistance of experienced service providers in required areas of interest necessitated by a complaint.The nature of the services to be provided is assistance to the EIB-CM, based on its caseload and case-by-case need. Assistance required may vary from single expert opinions on allegations concerning large or complex projects (lot 1) to general case handling (lot 2).