LLD.md (Low Level Design) Template

Use this template to create detailed low-level design specifications.

Component: [Component Name]

Business Rules

[Business logic and rules that drive this component]

Example:

1. [Rule 1]
2. [Rule 2]
3. [Rule 3]

Validation Rules

[Input/output validation requirements]

Example:

• Field Name:
  • [Validation requirement 1]
  • [Validation requirement 2]

Error Handling

[Error scenarios and how they should be handled]

Example:

• ExceptionName:
  • HTTP Status: [Status code] (for APIs)
  • Message: “[Error message]”
  • Recovery: [How to handle]

Transaction Boundaries

[Transaction scope and management - for backend]

Example:

• [Operation 1] and [Operation 2] must be atomic
• If [Operation 2] fails, rollback [Operation 1]

Security Requirements

[Security constraints and requirements]

Example:

• [Security requirement 1]
• [Security requirement 2]

Performance Considerations

[Performance requirements and optimizations]

Example:

• [Performance requirement]
• [Optimization strategy]

Component: [Another Component Name]

[Repeat structure for each component]

Notes

[Any additional notes about the design]