Which of the following are recognised investigative techniques?

Workshops are recognized investigative techniques because they facilitate collaborative discussions among stakeholders, allowing for the gathering of diverse perspectives and insights in a structured environment. They enable participants to brainstorm, clarify concepts, and collectively analyze issues related to business change. Workshops often bring together individuals with different expertise and experiences, promoting a more comprehensive understanding of the challenges and opportunities faced within an organization.

In contrast, while interviews, document analysis, and surveys are indeed effective investigative techniques, the question specifically seeks the most recognized approach among the provided options. Workshops stand out for their interactive nature and ability to drive consensus and engagement among participants, making them an essential tool in the business change practice realm.