Advantages and disadvantages of traditional telephone access

1, home visit: advantages of face-to-face communication, you can get the true thoughts and feelings of the respondents, the survey data is more accurate, the cost of shortcomings investigation is higher, a lot of manpower and material resources are needed, and the investigation time is longer, which will be affected by the respondents' own factors.

2. Telephone inquiry: The advantages are quickness, convenience and wide coverage, which can save time and cost. The survey results of shortcomings are affected by the telephone usage rate, and some respondents are unwilling to answer the phone, so the depth and detail of the survey are limited.

3. E-mail interview: The advantages can cover a wide audience, and the investigation cycle is long. Respondents have enough time to answer questions, and the accuracy and recovery rate of defect investigation are affected. The mailing cost is high and it takes a lot of time and energy.

4. Interception: The advantage is that a large amount of data can be obtained in a short time, and the survey results are more real and reliable. Disadvantages will be limited by geographical location and the number of interceptors, and the survey results will be biased.