Example: an instrument logic analyzer.
Focus groups - most frequent complaints ease of use. 3 groups of 10 customers
Interview 100 customers face to face
Requirements- learn to use in 10 minutes or less
Testing prototype- video tape 30 users first attempts to use
Meet with ease of use experts (Apple engineers)
Fix inconsistency
Test the final product with end users.
Design the marketing materials to communicate the ease of use.