Embarking on any project without a clear scope is like sailing without a compass. This task is pivotal as it sets the foundation for our backup testing journey. What exactly are the boundaries of our test? Which systems, databases, or files are included? Answering these questions ensures we're aligned and no critical component is left unchecked. Potential challenges here often include overlooking vital data or underestimating system complexity. However, with a thorough assessment and collaboration with stakeholders, we can capture everything essential. Resources needed might include network diagrams and data inventories.