A volunteer group used a digital map to plan deliveries after a storm. The map highlighted the shortest routes, but several streets were blocked by fallen branches. Some volunteers knew the neighborhood well and chose longer roads that remained open. Others followed the map until they reached a blockage and then had to turn back. The group learned that route length alone was not enough to predict arrival time. Before the next delivery, it added recent road reports and marked locations where information had not been confirmed. The revised map did not guarantee the fastest trip, but it helped volunteers distinguish a known delay from an uncertain route. During the second delivery, fewer teams turned back, although heavy rain made travel slower for everyone. The group concluded that a useful plan should identify the first source of uncertainty and update that information before adding more detailed instructions. Weather effects would be examined separately in a later review.