Which factors determine the scope and milestones of an investigation?

• A. Pilot experience, flight route, and altitude.
• B. Severity, data availability, safety risk, and regulatory requirements.
• C. Weather, ticket price, and airline branding.
• D. Aircraft age, color, and maintenance vendor.

Answer: (B)

The main idea is that the scope and milestones of an investigation are shaped by risk, evidence, and regulatory obligations. The severity of the incident or event helps decide how broad and deep the inquiry needs to be and how quickly milestones should be established. Data availability matters because what you can actually examine depends on what records, logs, or physical evidence are accessible; if key information is missing or hard to obtain, the plan must adapt and set realistic milestones accordingly. Safety risk guides how resources are prioritized and which lines of inquiry are pursued first, ensuring the investigation focuses on factors with the greatest potential impact on future safety. Regulatory requirements then provide the formal framework—legal authority, mandated timelines, required reports, and approved processes—that the investigation must follow. Together, these factors create a structured, risk-informed path with clear milestones.

Other factors like pilot experience, flight route, and altitude describe the operation but don’t determine how an investigation should be scoped or paced. Weather, ticket price, and airline branding are situational or commercial considerations that don’t set the investigation’s framework. Aircraft age, color, and maintenance vendor might influence certain technical questions, but they don’t establish the overall scope and timeline in the same way as severity, data availability, safety risk, and regulatory requirements.