Enterprise Software Documentation

1. Executive Summary
2. Business Context
3. Solution Overview
4. System Architecture
5. Infrastructure Architecture
6. Solution Components
7. Technology Stack
8. Supported Environments
9. Deployment Architecture
10. Configuration Management
11. Software Versions
12. Application Modules
13. API Documentation
14. Database Documentation
15. Security Controls
16. Authentication & Authorization
17. Observability
18. Logging
19. Monitoring & Alerting
20. High Availability & Disaster Recovery
21. Architecture Decision Records (ADRs)
22. Operational Runbook
23. Troubleshooting
24. Known Issues & Limitations
25. Support Model
26. Release Management
27. Appendix

Describe the business problem being solved.

• Objective 1
• Objective 2
• Objective 3

• Developers
• Architects
• Security Reviewers
• Operations Teams
• Support Engineers
• Project Managers

• Driver 1
• Driver 2

Provide a high-level description of the application.

• Capability A
• Capability B
• Capability C

• Feature A
• Feature B

• Feature X
• Feature Y

+----------------------+
|      End Users       |
+----------+-----------+
           |
           v
+----------------------+
| Application Gateway  |
+----------+-----------+
           |
           v
+----------------------+
| Web/API Tier         |
+----------+-----------+
           |
           v
+----------------------+
| Business Services    |
+----------+-----------+
           |
           v
+----------------------+
| SQL Database         |
+----------------------+

![Context Diagram](docs/diagrams/context-diainer Diagram

![Container Diagram](docs/diagrams/container-diagram.agram

![Componentms/component-diagram.png

![Deployments/deployment-diagram.png

• Azure
• Windows Server
• Hybrid

Describe hosting topology.

Web UI
  |
  +--> API
            |
            +--> Authentication
            |
            +--> Database
            |
            +--> External Systems

Source Control
      |
      v
Build Pipeline
      |
      v
Artifact Repository
      |
      v
Deployment Pipeline
      |
      v
Target Environment

• Azure DevOps
• GitHub Actions
• Jenkins

1. Build
2. Unit Test
3. Security Scan
4. Package
5. Deploy
6. Smoke Test
7. Production Validation

Describe functionality.

• Responsibility A
• Responsibility B

• Dependency A
• Dependency B

Describe functionality.

• Responsibility A
• Responsibility B

https://api.company.com/v1

• URI Versioning
• Header Versioning
• Semantic Versioning

Example:

GET /api/v2/customers

Describe authentication requirements.

Example:

Authorization: Bearer <token>

Returns customer information.

GET /api/v2/customers

{
  "id": 1,
  "name": "Example Customer"
}

Describe primary database(s).

![Database Diagrambase-diagram.png

Describe the security model.

• Azure AD
• Active Directory

• TLS 1.2+
• Encryption at Rest
• Encryption in Transit

• Azure Key Vault
• Managed Identities

• Firewalls
• NSGs
• Private Endpoints

• Dependency Scanning
• Infrastructure Scanning
• Penetration Testing

User
 |
 v
Identity Provider
 |
 v
Application

• Request Count
• Response Time
• Error Rate
• CPU Usage
• Memory Usage

• Application Logs
• Security Logs
• Audit Logs
• Integration Logs

• Distributed Tracing
• Correlation IDs

• Azure Monitor
• Application Insights
• Log Analytics
• SCOM

• Database Backups
• Configuration Backups
• Infrastructure Backups

Document recovery steps.

Proposed / Approved / Deprecated

Problem statement.

Chosen solution.

• Option A
• Option B
• Option C

Positive and negative outcomes.

YYYY-MM-DD

Document process.

Document process.

Document process.

Describe symptoms.

• Cause 1
• Cause 2

Resolution steps.

Steps to restore connectivity.

Level 1 → Level 2 → Level 3 → Vendor

1. Code Complete
2. Testing
3. Approval
4. Deployment
5. Validation

• Internal Wiki
• Architecture Repository
• Source Code Repository
• Security Standards
• Support Runbooks