> ## Documentation Index
> Fetch the complete documentation index at: https://docs.keldyn.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Working with a use case
> Understand the use case workspace: generate an architecture, run security analysis, and track compliance and security progress.
Once you've [created a use case](/user-guide#create-a-use-case), Keldyn drafts its architecture and opens the **Architecture Workspace** — your home base for reviewing the system, running security analysis, and tracking progress against your frameworks.
The overall journey follows three stages: **Requirements → Design → Review**.
## Generate the architecture
After you submit a use case, Keldyn builds an architecture model from your requirements and answers. You'll see a **Generating Architecture** screen while it works, then an **Architecture Preview**.
On the **Architecture Preview**, check the generated snapshot of your system.
Select **Review and Edit** to open the architecture editor and adjust the model, or **Continue** to move into the workspace. Keldyn kicks off a security analysis in the background.
## The Architecture Workspace
The workspace is organized into five tabs. You can change the use case's lifecycle status (Draft, Under Review, Approved, Active, Production, Suspended, Retired) or edit it from the header.
| Tab | What it's for |
| -------------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| **Progress Tracker** | An at-a-glance view of security coverage, compliance coverage, overall requirements complete, and architecture threat mitigation. |
| **Compliance** | Track regulatory control requirements (for example GDPR and the EU AI Act) and their implementation. |
| **Security** | Track security controls and review the risks/CWEs surfaced by architecture analysis. |
| **Architecture** | Review the generated model — summary, data flow and data asset diagrams, saved versions, and asset inventory. |
| **Reporting Hub** | Access documents, exports, and your reporting posture. |
## Run security analysis
Keldyn analyzes your architecture for threats and weaknesses. Analysis runs automatically after generation, and you can re-run it whenever the design changes.
* When something needs attention, an alert banner appears at the top of the workspace with actions like **Run Analysis**, **Re-run Analysis**, **Review Risks**, or **Review Controls**.
* Results populate the **Architecture Threats** card on the Progress Tracker and the risk table on the **Security** tab.
Re-run the analysis after editing your architecture so threat and control data stays current.
## Track requirements and risks
On the **Compliance** and **Security** tabs, each control appears as a row you can expand to see its description, implementation guidance, underlying threat, finding, and evidence. From there you can set a control's status, assign an owner, or mark it not applicable.
For details on working with controls, see [Frameworks & controls](/frameworks-and-controls).
On the **Security** tab, the **Architecture CWEs** section lists risks from the analysis with their severity and a tracking state (for example Not Reviewed, In Progress, Mitigated, or Accepted) that you can update as you address them.
## Next steps
Enable frameworks and track control implementation across your organization and use cases.
Attach evidence to controls and manage audits and certifications.