He did a great job.
Stop using these 1-5 gradations on personal.
This is drussing to employees as one one answer is a technical passing grade.
These "lean" management techniques are not a credible tool to verify acceptance of staff but simply a mis-applied tool.
Remember, only the 5th star is a 80 to 100% passing grade.
The 4th star is 60-80% are only 1/2 passing.
The rest are deemed unacceptable.
This is an old management trick to infer only the 5 star are acceptable.
Lean engineering uses this technique to beat down the employees knowing full well the scale is bogus.
At least a 1 to 10 scale leaves some crediblity.
Stop using these "services" that promise 10% returns to your management.
These are just tools by wanna-be huckers selling their servives.