Scalability is a key goal for a Power BI consultant. They ensure that the data infrastructure and dashboards they create can handle increasing data volumes and more complex queries as the organization grows. This involves designing efficient data models, optimizing report performance, and using Power BI features like aggregations and incremental data refresh. The consultant also ensures the solution can scale across departments or geographic locations, allowing for consistent and accurate reporting even as the business expands. This future-proofing is essential for long-term success.