Consulting firm Deloitte asks four questions to rate an employees performance:

Given what I know of this persons performance, I would always want him/her on my team. (Responses reported on a five-point scale ranging from Strongly Disagree to Strongly Agree.)

This person is at risk for low performance (Yes/No).

Given what I know of this persons performance, and if it were my own money, I would award this person the highest possible compensation increase. (Responses

reported on a five-point scale ranging from Strongly Disagree to Strongly Agree.)

This person is ready for promotion today (Yes/No)

What are your thoughts regarding measuring performance with four simple questions? Do you think these are the right questions? How would you know if a particular question is effective or not?