When I suggest to my students that they edit from the end of their work, I want them to begin at the last sentence and work backward, sentence by sentence. The reason for this is that our brains are amazing things, and when we read from the beginning we often "see" what we intended to write/type, not what is actually on the page. By starting at the end and disrupting the flow of the ideas, often students will find errors in spelling, capitalization, and usage that they skipped over when reading from the beginning. Starting at the end can also help writers who become fatigued or distracted as they move through their writing to fix errors further on in their writing. I use editing backwards as a proofreading technique, not a technique for revision. I can imagine that there might be some type of work in which you could map the details from the end moving backward to be sure that an important step wasn't missed, but I have used this technique more as a proofreading tool.