Most dial-in mistakes come from changing too many variables per shot. This workflow keeps changes deliberate and uses numeric bands so each correction has a reason.
1. Lock dose and prep
Pick one basket dose and keep it constant for the session. Keep distribution and tamp method constant as well.
A stable prep baseline gives you clean signal; without it, grind changes can look random even when the grinder is fine.
2. Set ratio and use time bands
Start near 1:2 (for example 18g in and 36g out) and use 25 to 35 seconds as your classic baseline band.
Use 1 micro-step grind moves when you are within 6 seconds of target. If the shot is 10 or more seconds outside target, use 2 to 3 micro-steps.
3. Read taste after flow stabilizes
When time is in band, tune yield in 1 to 2g steps for flavor. Sour and thin usually needs more extraction; dry bitterness usually needs less.
Only after grind and ratio are stable should temperature move, and then by 1C increments.