Roberto is thinking about redoing the walls in his bedroom, but there is 30-year old wallpaper currently in place. he knows that this will be a big task, but he thinks that he will first remove the wallpaper, then remove the glue-strip layer, then repair the wall before priming and painting it. these steps make the job feel less cumbersome and more manageable. which heuristic is roberto using?

Roberto is using "breaking into subproblems".

A heuristic procedure, regularly called a heuristic, is any way to deal with critical thinking, learning, or revelation that utilizes a functional technique not ensured to be ideal or impeccable, but rather adequate for the prompt objectives. Where finding an ideal arrangement is unthinkable or unfeasible, heuristic techniques can be utilized to accelerate the way toward finding an agreeable arrangement.

rain should be the answer.