"What job have you hired the product for?"
Leads to discovery of indirect competitors
"A job is some progress that the customer seeks to make."
Circumstance has an impact - product hired by the consumer for different jobs in different circumstances (milkshake problem)
Three aspects
Job is not
a. Life goal
b. Need
Job includes circumstance which need doesn't
Focus on the "Why" - the how changes over time with technology
Process
Why?