As someone involved in Information and Archives where this project was based, it serves as both a cautionary tale on outsourcing and a good example of when to recognise a sunk cost. This has been rumbling on for years ever since Siemens received the contract without competition due to an outstanding deal. The technology surrounding what they were trying to achieve has changed massively in that time frame but doesn't excuse them from delivering nothing of value. These projects have since come back in-house where the BBC has a history of delivering excellent technical products.
The new Director General, Tony Hall, has had to recognise this project as a failure and put it on the books. No doubt the conservative press are going to tear him apart for it but he's made a tough decision that had to be made. Continuing to pour money into the project would have left an even greater mess for somebody to take a bullet for later on.
There's a thorough analysis here: http://www.bbc.co.uk/blogs/aboutthebbc/posts/The-BBC-announc...