Dial-in cards for busy service
Recall the first diagnostic move for common brew defects under service pressure.
Fast, sour, hollow, low TDS. First move? Increase extraction with a small finer-grind or contact-time move while holding ratio and temperature fixed. Fast flow plus sharpness points to low extraction, not just weak strength. Weak cup: ratio or extraction? Taste quality decides which axis is off. The cup is bitter, so it must be over-extracted. A teammate wants to grind coarser immediately. Your line Maybe. First check TDS, ratio, drawdown, and bed shape so we know if it is high strength, over-extraction, or uneven extraction. Treating a taste word as a complete diagnosis. It keeps bitterness useful while asking for…
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