When a measurement is needed to determine the score…
Stay out of the house!!!!
The skips or vice-skips in charge of the house decide on the score. ALWAYS. WITHOUT EXCEPTION. No one else’s opinion matters. For that reason it’s customary, and good form, to stay outside of the hog line or off the playing surface while a measurement is taken. If the two players in charge of the house need assistance with a measurement, they will ask an impartial person to help.
It’s always a good idea to positively hear the two players in charge of the house agree on the score before you move any rocks at the conclusion of an end. If you accidentally move a rock that the people in charge of the house wanted to measure, your opponent automatically gets the benefit of the measurement that never happened.
The relevant rule in the Rule Booklet:
(c) The score of an end is decided when the skips or vice-skips in charge of the house agree upon the score. If stones that may have affected the points scored in an end are displaced prior to that decision, the non-offending team receives the benefit that might have accrued from a measurement.