There's a standard debiasing approach for the planning fallacy. I don't know if the availability heuristic has been cited, but it seems to have been described: "When you want to get something done, you have to plan out where, when, how; figure out how much time and how much resource is required; visualize the steps from beginning to successful conclusion. All this is the "inside view", and it doesn't take into account unexpected delays and unforeseen catastrophes."