What technique is useful for examining available materials when subject matter experts are unavailable?

Document analysis is an effective technique for examining available materials, particularly in situations where subject matter experts are unavailable. This method involves reviewing existing documentation such as reports, contracts, project plans, or any other relevant materials to gain insights into the requirements, processes, or context of a project.

When subject matter experts are not accessible, document analysis allows business analysts to gather information that already exists within the organization. This technique helps in identifying the current state, understanding business needs, and uncovering any gaps in information without requiring direct input from experts. By analyzing documents, the business analyst can construct a foundational understanding that may inform further stakeholder engagement or requirements gathering processes when experts become available.

The other techniques listed, while valuable in different contexts, depend on direct interaction with individuals or rely on insights gained from discussions or observations. Therefore, when experts are unavailable, these methods would not be applicable for obtaining necessary information, making document analysis the most suitable choice in this scenario.