Classic Does failing a dungeon/raid reduce my Raider.io score ?

Basically the title . Im a new player and new to this concept that everyone check you io score Does it work like , the more you success the more score you get , or does it take into account your failures as well, so then it measures rate of success and not only a certain number of completed dungeons Tnx for help via /r/wow https://ift.tt/37ZbJZS