Multiple Reports with a single semantic model in PBI Service

Hello,

What are the steps to set up

• One semantic model
• Multiple reports connected to the same model

After the initial set up is done, what are the steps to make modifications? (We have to use Power BI Desktop to make report changes due to features in Power BI Desktop. That is, we cannot/don't want to make changes directly on PBI Service)

• Make changes to the semantic model (without having to overwrite any of reports)
• Making changes to reports (without having to overwrite the common semantic model)

When an updated report pbix is uploaded to PBI Service, is there way to specify not to overwrite the common semantic model or not to upload a semantic model and simply to upload/update the report?