Check the mountain. Verify current closures, trail hours, heat restrictions and weather before anyone gets dressed for the hike.
Check the humans. Use the least-experienced hiker as the baseline. Ask about heights, scrambling, heat, knees, energy and willingness.
Choose the objective. Summit, partial Cholla, scenic Camelback views, or a nearby easier desert outing are all legitimate plans.
Set the turnaround before starting. Pick a time, water threshold and terrain threshold. Turning around is the plan working, not the plan failing.