Visuals and a Bit of Drama
Labels, lines, and shadows have little personality. Their job is largely around identification, location, and quantity.
Visual performance metrics provide insight into the health of a process or value stream by comparing actual performance versus target within the context of people, quality, delivery, and cost.
Andons are dynamic in nature. They visually (and often audibly) signal abnormal conditions and trigger problem-solving...or at least, most immediately, problem containment.