Scouts test a knot before trusting their weight to it. Test your plan before you stand on it.

A knot that looks right and a knot that holds are two different facts, and the gap between them only shows up under load. Plans work the same way. On paper everything connects, and then the first real weight finds the one place you assumed instead of checked. Testing is cheap precisely because you do it while falling costs nothing.

Find the assumption your plan would collapse without and test that one first. Call to confirm the hours are what the website says. Try the route once before the morning it matters, or run the code on the small case before the big one.