By now BT should have a good feel as to how long it typically takes to enable an exchange so the intialdates should be reasonably accurate and they could also update the plan dates as they progressed,

Currently though the dates are pure fiction as how else can you explain the constant 90% slippage at the end of each quarter. If properly managed the nunber of exchanges over running should only be in the 5% region

Yes changes this week. Barnwood has gone back from September to December. That make a mess of my plans!

Simon / MHC

Looking at the stats on the fact sheet 3388 exchanges have 11.7% of premises so these have very few cabinets each and are mainly rural.
There will be a lot of EO lines so that will push the average per Cab up quite a bit as well

The other 2500 exchanges have most of the 85k cabs, say 75k this is 30 cabs per exchange and the bigger ones have over a hundred.

What people forget is that this isn't a greenfield housing development where the developer controls all the access rights. This is project managing up to 20000 developments a year if they are going to do 60000 cabs in 3 years!

Nearly every cabinet needs Pavement or Roads digging up for Fibre access and again for power each of which needs council permission. You have to site each one that needs permission again from the rights holder to the land.

Some rights owners or councils will not give permission, see Kensington and Chelsea, so cabs slip from what BT wanted to do, none of which is forecastable until they start to ask for permission.

The slippage is nothing like 90%. I downloaded the openreach files and still have the old copies. In Dec11 there where 697 live exchanges and 506 more planned by June 2012. According to the site now there are 1092 live exchanges. That make 9.1% slippage and some of those may only be days, (waiting in hope for mine to go live now!)
Someone with the latest spreadsheet may be able to say how many Cabs are now live nationally. Assuming the legendary min 10 cabs per exchange thats a min of 10000 cabs and may be closer to 20000 which to me seems a fast rollout rate.

We ought to give credit where it is due even if we would all like it done faster (especially where we live).