As redblackthree says below, there's some leeway in there. I guess it comes down to knowing what tradeoffs are you doing to get it done sooner. In my case I usu

As redblackthree says below, there's some leeway in there. I guess it comes down to knowing what tradeoffs are you doing to get it done sooner. In my case I usually know where I've done some cheapish job and mark the code area with a "FIX: explanation of what should be done" for when I have time for that. I also eventually come back and clean up whatever code mess I got, or at least comment the mess so it doesn't come biting back at me in the future.