Telephone surveying is the fastest, most cost-effective means of getting feedback from large samples of people and is ideal for providing a 'snapshot' overview or benchmark of where you are at present– and then for tracking performance over a period of time.

It must be noted that with a telephone interview methodology, there is some restriction on the length of the questionnaire. Experience has shown that respondent fatigue can set in and quality of responses drops off the longer the survey is.