When do you decide to switch stimulants vs. continuing to maximize dosage in ADHD treatment?

I definitely agree with Dr. @Dr. First Last about the core concept that this question appears to be asking - "When do you know if a stimulant is just not working for your patients symptoms, and/or when do you decide to change to a different stimulant?" Before answering the second part of this core q...

The question suggests that the problem for which an answer is being sought is the ineffectiveness of the stimulant (otherwise, why "maximize dose"?). In my practice, when a stimulant is ineffective, my first tendency is to return to the diagnostic question to make certain that ADHD is what I’m seein...