What is basic information needed to plan an investigation?

The fundamental element necessary to plan an investigation is the location. The site of the incident provides critical insights that shape the direction of the investigation, including identifying potential evidence, determining pathways for fire spread, and understanding the context of how the fire started. Gathering information about the location encompasses understanding the physical layout, accessibility, potential hazards, and legal aspects, such as ownership and occupancy, all of which are pivotal in determining the investigative approach.

Other factors, like interview logs, while useful later on, are contingent upon knowing where and how initial inquiries will take place. Similarly, trial balances and insurance payouts are more relevant to financial assessments and claims processes rather than the immediate logistics and groundwork of the investigation itself. Thus, without a clear understanding of the location, the planning of the investigation would be significantly hampered.