A recommendation is only as strong as the evidence beneath it. The difference between a confident guess and a grounded decision is a methodology that turns the messy reality of a process into something you can measure and defend.
Custom methodology does not mean inventing everything from scratch. It means assembling the right analytical techniques for this business — instrumenting the process, quantifying where performance leaks, and testing the change against live data rather than hoping for it.
When the method is sound, the recommendations stop being matters of opinion. They become the obvious reading of the evidence, which is exactly what makes them easy to act on and hard to argue with.
Every decision earned, not guessed: that is the standard a custom methodology holds the work to.