Taken from out official docs ........
Broadband Boost is one of Openreach's Engineering Services' propositions and comprises of a range of engineering activities in order to try and improve the speed, quality and reliability of an end user's broadband service. The engineering activities undertaken within the Broadband Boost service can include work on end user owned wiring and equipment, customer equipment at the end user's premises and work on the BT network itself right back to the local exchange. It is different to the LLU Special Faults Investigation product because:
it is an unregulated product available only to Communications Providers (CPs) who agree contract for the service
includes work on the end user’s wiring and equipment
Can be tailored to individual CP’s requirements. My interpretation of it
is , that Boost is all encompassing ....... whereas with SFI it all depends on what
modules the ISP has sanctioned. By that, I mean when we pick up an SFI task the ISP will have in the notes what they are prepared to pay for ......... ie: Wiring Module, Network Module, Frames Module ......... apart from the odd occasion where I've had a 'Frames Only SFI' task, the rest of the time all the modules are attached to a normal SFI task.
So, apart from semantics, the only real-world difference between Boost and an SFI is our ability to change out the Hub as mentioned previously, Chrys.