The following question was asked of executives: How do you know when to cut off research? The answers given: That’s a good question, a very good question, and some people don’t know when to cut it off. You have to have a feel; in some cases it depends on how much resource you have and whether you have enough resources to take a chance on sustaining research that may appear to be heading for a dead end. You don’t know sometimes whether you’re heading down the wrong path or not; sometimes it’s pretty obvious you ought to shift directions— you’ve gone about as far as you can or you’ve taken it far enough that you can demonstrate to your own satisfaction that you just can’t get there from here, or it’s going to be very costly. You may discover that there are more productive ways to get around the barrier; you’re always looking for faster ways. And it depends entirely on how creative the person is, whether he has tunnel vision, a very narrow vision, or whether he is fairly flexible in his conceptual thinking so that he can conceive of better ways to solve the problem. Discuss the validity of these remarks.