Ediflex is a platform, accessible via an Internet browser, which makes it possible to dematerialize all administrative and financial exchanges related to the execution of a public works contract. Developed since 1989, this service has been used for several thousand operations with Public Owners (Local Authorities, Ministries, Hospitals, Cities, Public Establishments, SEM, Trams, etc.) and Private Owners. As soon as the contract is awarded, all that is needed is a computer connected to the Internet for each participant in the market to be able to connect and access the financial documents of the market. At the start of the operation, the Contracting Authority or his Contracting Authority Assistant records the financial parameters of the works contracts. Each month, on screen, the companies present their work situations, the project management verifies them and the representative of the contracting authority validates them then publishes the supporting documents.