A dynamic diagram for a set of connected tasks comprises icons in a graphic user interface, each icon representing a task, including a first task, a last task, and at least one intermediate task, the at least one intermediate task having at least two connected tasks one of which can optionally be immediately performed after the at least one intermediate task. Only one of the tasks is a current task represented by an active icon. Remaining tasks are represented by inactive icons. Two of the inactive icons, each representing one of the at least two connected tasks, are selectable as a new active icon representing a new current task; and first new-task indicators indicating the selectable inactive icons representing the at least two connected tasks.