Service quality is easier to define and understand than product quality False True Moving to another question will save this response. (9) hemern. can be iones becaide ts soites tentr fun areage wuaty. Of the four costs of quality, which one is generally the hardest to estimate, and often, the most expensive type of cost? External Failure cost Appraisal costs Internal failure costs Prevention costs Moving to another question will save this response. Q ropes o. 3 in (4) 7104 9+20