Walk through the day as the person with the tightest timetable
Write down the end of the first commitment, the earliest departure, the journey and the required arrival inside the next location. A driver leaving work at five cannot complete a twenty-minute trip and reach a five-ten pickup. Even an immediate departure gives an earliest arrival of five twenty, before any time to park or walk to the gate. The problem is a ten-minute structural gap, not poor attention to reminders.
Find the commitment that can actually move
Try it for Wednesday. If one adult finishes work at five, needs twenty minutes to reach school, and must collect at five ten, the plan needs a change. Move the work finish, find another collector, or ask about a later collection before the day begins.
Check the revised sequence all the way through
If another adult offers to collect, check their own departure, vehicle access and authorization with the organizer. Reassigning the job on paper is not enough if the second adult faces the same hard finish time. Repeat the walk-through for the next commitment after pickup; a fix that covers the gate might still leave dinner or a second collection impossible. Put the new owner, actual time and meeting place where affected people can verify them.