Shelly is the project manager of the BUF project for her company. In this project Shelly needs to establish some rules to reduce the influence of risk bias during the qualitative risk analysis process

Grouping stakeholders by attitude addresses stakeholder engagement strategy, not the standardization of risk scoring criteria that reduces assessment bias.

Identifying root causes helps ensure completeness during risk identification but does not standardize the measurement scales used to score probability and impact.

Establishing risk boundaries defines the scope of what qualifies as a project risk but does not address how those risks are measured or rated consistently.

When all participants use the same explicit scale definitions - for example, 'high probability means 70-90%' - risks are scored against objective criteria rather than personal judgment, eliminating the influence of individual bias or the reputation of the person identifying the risk. This standardization is the technique recommended by PMBOK to ensure consistent and repeatable results across all team members and stakeholders. Without these definitions, different assessors will apply different interpretations of the same probability or impact level.