Contact is the second factor. If your Operatives can complete a mission without setting off the alarm, the Contact Score is 500 points. If the alarm is set off, the Contact Score is 0. This is due to the fact that you were excessive. They key to a good score is stealth.
Damage is the third factor.
Taking damage can really hurt your score. The Total Mission Score is equal to the Time Score plus the Contact Score, minus the Damage Score. The Total Mission score is then multiplied by seventy-five percent for Easy level or one hundred and fifty percent for Hard level. In order to get a high score, your Operatives must move quickly, not set off an alarm, and avoid taking damage. You may have noticed you get no points for taking out enemies.