Which of the following is NOT a technique used in Document Analysis?

Document analysis primarily involves examining existing documents to extract relevant information and insights for business analysis. This technique focuses on understanding the content and context of documents to identify requirements, verify existing processes, and gather data without direct interaction with people.

The correct answer is based on recognizing that focus groups, while an effective research method, do not fit the category of document analysis. Focus groups involve bringing together a small group of people to discuss a topic or collect opinions, which is an interactive process and not reliant on previously created documents. In contrast, surveys, data analysis, and interviews all involve gathering or interpreting information potentially derived from documents, making them related to the document analysis context but resulting from different approaches.