Are stimulant prescriptions for ADHD carefully calibrated in dosage and time to get patients to a baseline? In my experience, doctors ask you questions to deter

Are stimulant prescriptions for ADHD carefully calibrated in dosage and time to get patients to a baseline? In my experience, doctors ask you questions to determine if you have attention deficits, then give you a prescription, which will be changed in various directions (different medication, increased dosage, etc) if you report problems; they very rarely in practice have you take an in-depth "attention measuring" test and then prescribe on that basis. What is the baseline? Would anyone consider it cheating if they took extra or changed their dosing schedule to maximize their test score? I think most people would consider that rational behavior, not abuse. But it does call into question whether that's "fair" to people without the drug.