Which of the following are recognised investigative techniques?

Scenario Analysis is a recognized investigative technique that involves evaluating and exploring potential future events or scenarios by analyzing different variables and their effects on outcomes. This technique allows organizations to assess various possibilities and prepare for uncertainties by considering a range of scenarios. It encourages strategic thinking and helps in understanding the implications of different choices.

Questionnaires, mind maps, and observation, while useful tools for gathering information and facilitating discussions, do not fit the formal definition of investigative techniques in the same way that scenario analysis does. Questionnaires are typically used for data collection, mind maps aid in organizing thoughts and ideas visually, and observation is a method for understanding behaviors and processes. While these tools can complement investigative work, scenario analysis specifically focuses on evaluating potential future situations, making it a core investigative technique in the context of business change.