Scenario – Accounting application, data entry operators works 20-30 $/hour, total 10 data entry operators
What is the average time user wastes on UI per day? (For example – waiting for data, scrolling up-down/right-left, performance of controls (loading etc))
- 10-12 minutes per day of 8 hrs
Average time wasted per week per user –5 days * 12 minutes = 60 minutes
Average time wasted per month – 4 weeks * 60 minutes = 4 hours
Average time wasted per year – 12 months * 4 hours = 48-50 hours
Average time wasted for 10 data entry operators – 10 persons * 50 hours = 500 hours
Total cost = $20 or $30 * 500 hours = $10K to $15K
Conclusion – while designing UI, only look-n-feel is not important but you also need to consider for whom you are solving & how fast.
