Discipline never fails for the reason you think. Find the real moment, and you've found the actual symptom.
Ask a man why his last attempt at discipline collapsed, and the answer is almost always too broad to be useful. "I got busy." "Life happened." "I lost motivation." These aren't, they're just not diagnoses. They're the story told after the fact, smoothed over into something that sounds reasonable instead of something specific enough to actually treat.
The real moment is always more precise than that, and it's almost always recoverable if you're willing to look for it honestly. Not "I got busy," but the exact evening, the exact hour, the exact internal sentence that ran through his head right before the rule broke. That sentence is the actual symptom. Everything before it was fine. Everything after it was consequence.
This is the first real exercise in any case file: find the sentence. Not the week it fell apart: the specific moment, and the specific internal permission that was granted right before it did. Most men have never actually looked for this before, because "I got busy" is so much more comfortable than the precise, slightly embarrassing truth of the actual moment.
Once the moment is found, the protocol can actually be built to address it, not a generic overhaul, but a specific countermeasure aimed at the exact point where the previous attempt gave way. This is the difference between structure that's designed and structure that's just hoped into existence.