Navigate to Projects, select the ‘New Project’ button. You will need to give your project a name, this can be changed later. Add any relevant tags or description for your application or architecture, and hit Create. This will take you to the diagramming interface. Select ‘IriusRisk’ from the menu items and then select ‘Model Questionnaire’. For new versions of IriusRisk, after creation of a new threat model, the questionnaire can appear as a model on the right hand side - however your Admin can suppress this default setting if preferred.
By answering the questionnaire, you are able to create your threat model based upon this information and context. There are a series of sections to answer, and this can create subsequent or less questions depending on how you answer.