Fix the Chart

Answer key: possible redesigns

Case 1: Pilot evaluation

• Another possible option: Show weekly results across the pre-pilot and pilot periods, mark the intervention date, and include a historical control band.

Case 2: Retention planning

• Another possible option: Use one small-multiple dot plot per response level when exact shares matter more than the positive-versus-negative balance.

Case 3: Pricing review

• Another possible option: Show a sorted Q4-to-Q8 change plot for every segment, emphasizing Enterprise, when the main task is judging whether its change was unusual.

Case 4: Supplier quality

• Another possible option: Use a funnel plot of defect rate against shipment volume so unusually poor suppliers can be identified while accounting for different sample sizes.