Spot The Hidden Chart Trap In The Ward Board
Identify when a stacked composition answers a different question than the decision-makers are asking.
The team needs the trend in delays, not a tour of every category. Find the region that makes the waiting-time story hardest to read. The stacked colored segments in the center of the ward board Correct. The stacked segments use shifting baselines, so they hide the trend in the delay category. That violates chart-choice fit for a time trend. The nurse manager pointing at the board Plausible, but the presenter is not the chart problem. The issue is that the visual encoding makes the trend comparison difficult. The small colored magnets along the side of the board Those may be…
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