There also is little control over the interviewing process, because questions cannot be clarified and answers cannot be probed. Through this approach, researchers elicit cooperation by phone, then mail a survey and perhaps supporting materials, and then call back to collect answers over the phone. They can call back and get the same degree of control afforded by the telephone survey. Generally, this kind of survey is reserved for situations in which visual accents are desired. This method combines the costs of mail surveys and telephone interviews.
Interviews offer similar benefits to telephone interviews.
School officials also may be able to develop a better relationship with a child's parents. Interviews generally are more expensive than other methods. One or more of these meetings could be used as an opportunity for administrators and teachers to receive parental feedback on the school's performance. These interviews, however, can be time consuming, and charter schools must allocate sufficient time throughout the school year to conduct them. Once a customer satisfaction survey format has been decided upon, a charter school should review its marketing plan to review who the surveys or interviews should target.