Terseness
Many engineers stress that writing should be terse. Lengthy sentences and long paragraphs are signs that your writing is not terse. The reason why terseness is necessary to good engineering writing is because it helps your readers understand information quicker. For example, you can write five paragraphs about the procedures you followed during a lab, or you can summarize the key points in a paragraph or two.
What's important to remember about terseness is that you shouldn't give up any detail. In other words, don't delete large portions of text because you think you've been too wordy. Remember that good writing is descriptive, but it also gets to the point as quickly as possible. The information you present should always be relevant to your topic, as well as to your audience.