Which of the five types of data gathering do you think would be most effective for you as a potential OD consultant?

I’m trying to learn for my Management class and I’m stuck. Can you help?

  • Which of the five types of data gathering (Interviews 2. Focus groups 3. Surveys/questionnaires 4. Observations 5. Unobtrusive measures) do you think would be most effective for you as a potential OD consultant?
  • Have you ever participated in a project or organization that used this method? How did it feel? Were you put at ease or did you feel uncomfortable? What are some lessons from your experience that might apply if you were to conduct an OD diagnosis and feedback session using this method?