(42)There is a great need for contracting authorities to have additional flexibility to choose a procurement procedure, which provides for negotiations. A greater use of those procedures is also likely to increase cross-border trade, as the evaluation has shown that contracts awarded by negotiated procedure with prior publication have a particularly high success rate of cross-border tenders. Member States should be able to provide for the use of the competitive procedure with negotiation or the competitive dialogue, in various situations where open or restricted procedures without negotiations are not likely to lead to satisfactory procurement outcomes. It should be recalled that use of the competitive dialogue has significantly increased in terms of contract values over the past years. It has shown itself to be of use in cases where contracting authorities are unable to define the means of satisfying their needs or of assessing what the market can offer in terms of technical, financial or legal solutions. This situation may arise in particular with innovative projects, the implementation of major integrated transport infrastructure projects, large computer networks or projects involving complex and structured financing. Where relevant, contracting authorities should be encouraged to appoint a project leader to ensure good cooperation between the economic operators and the contracting authority during the award procedure.