The "Framework Model" is a quite interesting and widely used model in England for bridges, resurfacing contracts, and professional services (design & planning). The main objective of the "framework model" is to reduce the amount of time for tendering, select tenders quickly for urgent projects, and reduce overall administration time and costs. Essentially the tendering process is to short list to about a maximum of 5 service providers that will be given projects based upon the skills and cost provisions, at the discretion of the client team. Prices are evaluated against so-called "dummy schemes" and there are criteria to measure past experience and competence of work. Those five service providers are then provided first consideration and these service providers are given projects on a rotational type system, on a negotiated type basis.
The duration is estimated for 3 to 5 years, but it can vary depending upon the type of framework. Prices are compared to the rates provided in "dummy scheme" to make sure they are competitive. England seems to be the only target country using the "framework model" and there is not enough data gathered to conclusively share results of this model.