"Guess what, the giant IT project turned out to be too complex to succeed."
The attraction of the big project is the (in theory) single interface with a single "systems integrator"
Reg readers know how well that plan works IRL. :-( .
I suspect an honest assessment of most of the ones that did work would be 1) Basically not really big enough to need an SI, who handed the work to a single (very competent) specialist contractor. 2) Re-scoped the project downward to a point where they could hand it to single (very competent) specialist contractor.
The rest would be the genuine, actual mega projects that succeeded.Remember, we're talking about successful projects that delivered actual improvements (over what they replaced) more or less on time and budget. I'm not sure how many of those exist in the UK.
I had the idea of a wedding planner. De-scoping follows
Complete church wedding for 200 guests and reception and honeymoon --> church wedding for 20 guests and reception and honeymoon --> church wedding for 20 guests and reception --> Registry office wedding and book tables at McD's for Happy Meals. --> Success