Grazyna, thanks for your post.
Your questions are good ones. Here are a few suggestions.
- Replace the 1-5 scale with a simple yes or no, e.g., Are you satisfied with the knowledge transfer process?
- Instead of asking them to quantify the value, which is hard to do, ask for one or two expected benefits.
- Ask no more than 3 questions of any one person.
By keeping the number of questions to a minimum and not making anyone have to think too hard about a 1-5 rating or a quantitative value, you can assure people that it will be fast and easy.