Which tool can update a measure definition in a large model without refreshing in the Power BI service?

• A. ALM Toolkit
• B. DAX Studio
• C. Excel
• D. Power BI Desktop

Answer: (A)

Metadata-only updates to a Power BI model let you change a measure without reprocessing or refreshing the data. The ALM Toolkit is built for this kind of update: it interacts with the model via its metadata (XMLA endpoints), compares changes, and applies updates to measures and other metadata in the live dataset without triggering a data refresh. This is especially valuable for large models where a full refresh can be very time-consuming, because you can deploy the corrected measure quickly and with minimal downtime. DAX Studio, Excel, and Power BI Desktop serve other roles—DAX Studio is for writing and testing DAX queries, Excel isn’t a deployment tool for service metadata, and Power BI Desktop edits measures locally but publishing to the service typically involves a data refresh or reprocessing rather than a metadata-only update.