So, you spend all this time outlining what you plan to write, including generating a list of events and the order they occur. Then, through no fault of your own, you change direction after chapter one. Oh Boy!!!
I've joined the mass of authors attempting to write a novel in a month's time (November). After working out the ending, I realized that the ending worked better as the beginning. Am I nuts? Well, yes, but that's besides the point! TThe action of writing outlines first and developing a list of characters who are deeply developed before putting pen to paper has made the change not so big a deal. The outlining process itself is often the hardest part, because we spend time getting familiar with the characters were about to spean 80,000 words of time with. The changes that occur along the way are to be expected. As long as you've put in some prep time, all is usually good.