A third or a sixth against the other voice.
A unison, fifth or octave against the other voice.
A second, seventh or tritone against the other voice.
The candidate belongs to the sounding chord.
The two voices move in opposite directions.
One voice holds while the other moves.
Both voices move the same way into a different interval.
Both voices move the same way, keeping the same imperfect consonance.
The candidate is a step from the previous note of its own line.
Per semitone of melodic movement, so a leap costs more than a step.
The move is a leap strict counterpoint forbids outright.
Per semitone away from the centre of the line's register.
How a profile ranks the candidates its severity table has let through.
Each field is a score contribution, added when the situation it names occurs; a negative value is a penalty. The scale is arbitrary but shared, so only the relative sizes matter. Nothing here can make an unsafe pitch usable: rejection is the severity table's business, and these weights only order what is left.