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Weighted Usability Factors. What is it?. W eighted U sability F actors. The WUF method. Example: Evaluating the best VCR. 1. Select the main factors and criteria. FACTORS. 1. Simplicity of Controls Play Fast Forward Rewind Counter Timer 2. Flexibility of Recording Options
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What is it? Weighted Usability Factors
The WUF method Example:Evaluating the best VCR
1. Select the main factors and criteria FACTORS 1. Simplicity of Controls Play Fast Forward Rewind Counter Timer 2. Flexibility of Recording Options “Instant” Recording Daily Recording Weekly Recording User Defined Recording Preset Recordings 3. Styling Colour Size CRITERIA
2. Rate the importance of each factor on a scale of 10 • 1. Simplicity of Controls • Play • Fast Forward • Rewind • Counter • Timer • 2. Flexibility of Recording Options • “Instant” Recording • Daily Recording • Weekly Recording • User Defined Recording • Preset Recordings • 3. Styling • Colour • Size (7 out of 10) (9 out of 10) (5 out of 10)
3. Rate the importance of each criterion on a scale of 10 • 1. Simplicity of Controls • Play • Fast Forward • Rewind • Counter • Timer • 2. Flexibility of Recording Options • “Instant” Recording • Daily Recording • Weekly Recording • User Defined Recording • Preset Recordings • 3. Styling • Colour • Size (7) 5 out of 10 6 6 9 8 (9) 9 out of 10 5 6 9 6 (5) 5 out of 10 5
1. Simplicity of Controls • Play • Fast Forward • Rewind • Counter • Timer • 2. Flexibility of Recording Options • “Instant” Recording • Daily Recording • Weekly Recording • User Defined Recording • Preset Recordings • 3. Styling • Colour • Size (7) 5 6 6 9 8 (9) 9 5 6 9 6 (5) 5 5 4. Rate the extent to which each criterion is met (out of 10) 8 out of 10 6 out of 10 6 out of 10 9 out of 10 4 out of 10 10 out of 10 8 out of 10 6 out of 10 8 out of 10 1 out of 10 8 out of 10 8 out of 10
1. Simplicity of Controls • Play • Fast Forward • Rewind • Counter • Timer • 2. Flexibility of Recording Options • “Instant” Recording • Daily Recording • Weekly Recording • User Defined Recording • Preset Recordings • 3. Styling • Colour • Size (7) 5 times 6 times 6 times 9 times 8 times (9) 9 times 5 times 6 times 9 times 6 times (5) 5 times 5 times 5. Calculate the weighted score for each criterion 8 = 40 6 = 36 6 = 36 9 = 81 4 = 32 10 = 90 8 = 40 6 = 36 8 = 72 1 = 6 8 = 40 8 = 40
1. Simplicity of Controls • Play • Fast Forward • Rewind • Counter • Timer • 2. Flexibility of Recording Options • “Instant” Recording • Daily Recording • Weekly Recording • User Defined Recording • Preset Recordings • 3. Styling • Colour • Size (7) 5 times 8 = 40 6 times 6 = 36 6 times 6 = 36 9 times 9 = 81 8 times 4 = 32 (9) 9 times 10 = 90 5 times 8 = 40 6 times 6 = 36 9 times 8 = 72 6 times 1 = 6 (5) 5 times 8 = 40 5 times 8 = 40 6. Total the scores } 225 } 244 } 80
1. Simplicity of Controls • Play • Fast Forward • Rewind • Counter • Timer • 2. Flexibility of Recording Options • “Instant” Recording • Daily Recording • Weekly Recording • User Defined Recording • Preset Recordings • 3. Styling • Colour • Size (7) 5 times 8 = 40 6 times 6 = 36 6 times 6 = 36 9 times 9 = 81 8 times 4 = 32 (9) 9 times 10 = 90 5 times 8 = 40 6 times 6 = 36 9 times 8 = 72 6 times 1 = 6 (5) 5 times 8 = 40 5 times 8 = 40 7. Divide by the maximum possible score, and convert to a percentage } 225/340*100 = 66% } 244/350*100 = 70% } 80/100*100 = 80%
7*66 + 9*70 + 5*80 1492 = = 71% 7*100 + 9*100 + 5*100 2100 8. Work out an overall usability score Total weighted score Maximum possible weighted score =
