I'm doing research on the relative performance of broadband network providers when it comes to the reliability of their consumer-grade services (DSL, fibre). There is a lot of information on performance like speed, throughput, ping; but not much on up-time, ability to connect every time, connectivity at layer 2, end-to-end accessibility ...
Has anyone done some research in this regard? Do you have links to published comparison? This to include impacts from layer 1 and 2 faults like cable breaks, power failures, transport and aggregation, DSL electronics, etc.
E.g.
UK ISP 1 - 99.40% availability
UK ISP 2 - 98.70% availability