In-depth interviews are expensive and time consuming. Why do market researchers sometimes use in-depth interviews in spite of these disadvantages?

Name: In-depth interviews are expensive and time consuming. Why do market researchers sometimes use in-depth interviews in spite of these disadvantages?
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The Answer of In-depth interviews are expensive and time consuming. Why do market researchers sometimes use in-depth interviews in spite of these disadvantages?

In-Depth Interviews Are Expensive and Time Consuming