The following is extracted from a Reddit thread (© /u/Global_Requirement11, not my work, just archiving for reference)
4:6 Order of Operations
Here is my order of operations for dialing in a new bean. This is pretty generalized, and there are times it would make sense to change a couple of variables at the same time (It doesn’t always take 5 brews to dial in). But is this a logical outline to follow? Any variables you would add?
18.5g coffee
300g water (120:180 ≡ 4:6)
Kingrinder K6
V60, Hario paper filter
90ºC
Brew 1 (baseline):
- Grind at 85 clicks
- Pour 1 - 60g
- Bloom 45 sec
- Pour 2 - 60g
- Pour 3 - 90g
- Pour 4 - 90g
Brew 2:
If too sour, grind finer (80 clicks)
If too bitter, grind coarser (90 clicks)
Brew 3:
To ↑ sweetness, adjust pours 1 and 2:
Pour 1 50g
Bloom
Pour 2 70g
To ↑ acidity, adjust pours 1 and 2:
Pour 1 70g
Bloom
Pour 2 50g
Brew 4:
To ↑ strength, adjust last 180g from 2 pours to 3 pours
Pour 3 - 60g
Pour 4 - 60g
Pour 5 - 60g
To ↓ strength, adjust last 180g from 2 pours to 1 pour
Pour 3 - 180g
Brew 5 (fine-tuning):
If bitter, lower water temp
If acidic, raise water temp