A dot-com company’s CEO is worried that the employees feel over-worked. She waits till 7 p.m. one night and proceeds to briefly interview each employee still there to see whether they feel she is overworking them. What problems are there with this approach?

Time wastage and not formal enough

Step-by-step explanation:

He didn't have to wait till that time to ask the the question, besides keeping them there will cause uneasiness between the workers because it's already late.

Another point is that some people might not decided to give him the reply face to face, as they night sound rude or something more than that.

A more formal approach and less time consuming and less stressful method like may be filling of forms, papers , or complaint letters should be used instead.