"Efficiently communicated project changes".Verbiage: The use of many words without necessity; a superabundance of words; wordiness. Resume: A small space in which you have to write your life story.
"Successfully completed project."
"I efficiently did this and I successfully did that". Sure it sounds good. But is it necessary? No. In the above examples, the words "efficiently" and "successfully" are mere verbiage.
If you put something in your resume, I assume it was successful and efficient. And no matter what, I'm going to ask you for some objective measurements anyway. So don't fill up precious space with this braggadacio. It's not successful or efficient. It's excessive.