Bad boiler

I just heard on the BBC someone say that British Gas goes out and mends a boiler every 60 secs, i.e. one per minute...

That means around 500,000 per year out of an estimated 25,000,000 total in UK. That means 0.02 failure rate, or 20,000ppm. which is TERRIBLE.

A good product should be less than 100ppm failure rate. So this is x200 worse.