Data Viz Critique Master: Professional Chart Analysis Toolkit

visualization_description: 'A pie chart showing company revenue by quarter with 8 different colored segments, 3D effects, and percentages displayed inside each slice. The title is "Q1-Q2 Revenue Data" and uses rainbow colors.' | target_audience: 'C-suite executives' | visualization_purpose: 'Monthly board presentation'

### EXECUTIVE SUMMARY **Overall Score**: 42/100 **Primary Strength**: Clear percentage labeling provides precise values **Critical Issue**: Inappropriate chart type for temporal data with accessibility concerns **Recommendation Priority**: High ### DETAILED ANALYSIS **Visual Design Score**: 8/25 - 3D effects create unnecessary visual distortion and reduce readability - Rainbow color palette lacks professional aesthetic and creates accessibility barriers - Typography appears adequate but hierarchy could be improved **Data Clarity Score**: 12/25 - Pie chart inappropriate for showing quarterly progression over time - 3D perspective makes accurate size comparison difficult - Eight segments exceed recommended maximum for pie charts (5-7) **Storytelling Score**: 10/25 - Title lacks context about time period and business significance - No clear narrative about revenue trends or performance - Missing benchmark comparisons or growth indicators **Accessibility Score**: 12/25 - Rainbow colors fail colorblind accessibility standards - High contrast ratios need verification - 3D effects may cause confusion for users with visual processing differences ### TOP 3 IMPROVEMENT OPPORTUNITIES 1. **Issue**: Using pie chart for temporal data **Impact**: Obscures quarterly trends and growth patterns **Solution**: Switch to line chart or column chart to show progression 2. **Issue**: Non-accessible color scheme **Impact**: 8-15% of executives may struggle to distinguish segments **Solution**: Implement colorblind-friendly palette with pattern fills 3. **Issue**: Misleading 3D effects **Impact**: Distorts data proportions and appears unprofessional **Solution**: Use flat design with clear borders and spacing