Fast and slow passes

Part of my revision process involves different kinds of passes through the manuscript. One way to divide these is by "fast" and slow."

Fast pass: A read through the manuscript that's as fast as my regular reading speed, maybe a little faster. On this kind of pass, I'm looking for issues such as:
Does the whole book hang together?
How's the pacing?
Are there inconsistencies, transition failures, contradictions?
How's the rhythm? Am I hitting any snags, or does it flow smoothly?

Slow pass: A read thr...