# C4 Model Quality Assurance Checklist

## Context Diagram (Level 1) Checklist

### Completeness

- [ ] All key users are represented
- [ ] Main software system is clearly defined
- [ ] All external systems are identified
- [ ] System description is clear and concise
- [ ] Business context is provided

### Relationships

- [ ] All user interactions are defined
- [ ] System-to-external system relationships are clear
- [ ] Relationship labels are descriptive
- [ ] Technology protocols are specified
- [ ] Data flow direction is clear

### Clarity

- [ ] Diagram is understandable to non-technical stakeholders
- [ ] Element names are business-focused
- [ ] No technical jargon in descriptions
- [ ] Layout is clean and uncluttered
- [ ] Relationships don't cross unnecessarily

### Best Practices

- [ ] Follows C4 model principles
- [ ] Appropriate abstraction level
- [ ] Consistent naming conventions
- [ ] No missing elements
- [ ] Technology choices are justified

## Container Diagram (Level 2) Checklist

### Completeness

- [ ] All major containers are represented
- [ ] Technology stack is specified for each container
- [ ] Container responsibilities are clear
- [ ] All external systems are included
- [ ] User interactions are shown

### Relationships

- [ ] Container-to-container communication is defined
- [ ] Data flow patterns are clear
- [ ] Security boundaries are identified
- [ ] Communication protocols are specified
- [ ] No circular dependencies

### Technology

- [ ] Technology choices are appropriate
- [ ] Scalability considerations are addressed
- [ ] Security requirements are met
- [ ] Performance implications are considered
- [ ] Maintenance requirements are reasonable

### Architecture

- [ ] Architecture patterns are appropriate
- [ ] Separation of concerns is maintained
- [ ] Dependencies are minimized
- [ ] Interfaces are well-defined
- [ ] Error handling is considered

## Component Diagram (Level 3) Checklist

### Completeness

- [ ] All major components are represented
- [ ] Component responsibilities are clear
- [ ] Interfaces are defined
- [ ] Data models are identified
- [ ] External dependencies are shown

### Relationships

- [ ] Component interactions are logical
- [ ] Data flow is clear
- [ ] Interface contracts are defined
- [ ] Error handling is considered
- [ ] Dependencies are minimal

### Design

- [ ] Single responsibility principle is followed
- [ ] Components are loosely coupled
- [ ] Interfaces are well-defined
- [ ] Error handling is comprehensive
- [ ] Testing considerations are addressed

### Technology

- [ ] Technology choices are consistent
- [ ] Performance requirements are met
- [ ] Security requirements are addressed
- [ ] Scalability is considered
- [ ] Maintenance is feasible

## DSL Quality Checklist

### Syntax

- [ ] DSL syntax is correct
- [ ] All elements are properly defined
- [ ] All relationships are valid
- [ ] All views are properly configured
- [ ] No syntax errors

### Structure

- [ ] Workspace structure is logical
- [ ] Model organization is clear
- [ ] View hierarchy is appropriate
- [ ] Styling is consistent
- [ ] Documentation is complete

### Completeness

- [ ] All referenced elements exist
- [ ] All relationships are bidirectional where appropriate
- [ ] No orphaned elements
- [ ] All views include necessary elements
- [ ] Styling is applied consistently

### Best Practices

- [ ] Naming conventions are followed
- [ ] Descriptions are clear and concise
- [ ] Technology labels are appropriate
- [ ] Layout preferences are applied
- [ ] Theme is consistent

## Visual Quality Checklist

### Layout

- [ ] Elements are properly spaced
- [ ] Relationships don't cross unnecessarily
- [ ] Grouping is logical
- [ ] Layout is clean and readable
- [ ] Autolayout is applied

### Styling

- [ ] Colors are consistent
- [ ] Element shapes are appropriate
- [ ] Text is readable
- [ ] Icons are meaningful
- [ ] Theme is applied consistently

### Clarity

- [ ] Diagram is immediately understandable
- [ ] Element names are clear
- [ ] Relationships are obvious
- [ ] Context is appropriate
- [ ] Audience needs are met

## Documentation Checklist

### Completeness

- [ ] All elements have descriptions
- [ ] All relationships are labeled
- [ ] Technology choices are documented
- [ ] Design decisions are explained
- [ ] Assumptions are stated

### Quality

- [ ] Descriptions are clear and concise
- [ ] Technical accuracy is maintained
- [ ] Business context is provided
- [ ] Stakeholder needs are addressed
- [ ] Maintenance information is included

### Consistency

- [ ] Naming conventions are followed
- [ ] Terminology is consistent
- [ ] Formatting is uniform
- [ ] Style is professional
- [ ] Updates are tracked

## Integration Checklist

### Workflow Integration

- [ ] Diagrams support development workflow
- [ ] Stakeholder communication is effective
- [ ] Documentation is up-to-date
- [ ] Version control is maintained
- [ ] Change management is in place

### Tool Integration

- [ ] Structurizr Lite compatibility
- [ ] Export formats are available
- [ ] Documentation systems are integrated
- [ ] Version control is supported
- [ ] Collaboration tools are compatible

### Maintenance

- [ ] Update process is defined
- [ ] Review cycle is established
- [ ] Quality gates are in place
- [ ] Training is provided
- [ ] Support is available

## Final Review Checklist

### Overall Quality

- [ ] All checklist items are completed
- [ ] Stakeholder feedback is incorporated
- [ ] Quality standards are met
- [ ] Best practices are followed
- [ ] Documentation is complete

### Readiness

- [ ] Diagrams are ready for use
- [ ] Documentation is complete
- [ ] Training materials are available
- [ ] Support processes are in place
- [ ] Maintenance procedures are defined

### Sign-off

- [ ] Technical review completed
- [ ] Stakeholder approval obtained
- [ ] Quality assurance passed
- [ ] Documentation approved
- [ ] Implementation ready