What is a high level solution design (HLD)?

Briefly describing the solution architects high level design

A high-level solution design is a strategic and conceptual overview of a proposed solution to address a specific problem or meet a set of requirements. It outlines the key components, architecture, and approach of the solution, without going into detailed technical specifications or implementation specifics.

The purpose of a high-level solution design is to provide a clear and high-level view of how the solution will meet the desired objectives and requirements. It helps stakeholders and decision-makers to understand the overall approach, scope, and feasibility of the solution before committing to its implementation.

A high-level solution design typically includes the following elements:

  1. Solution Overview: Describes the purpose, scope, and objectives of the solution, highlighting the main problem being addressed and the desired outcomes.
  2. Key Components: Identifies the major components or modules of the solution, explaining their roles and interactions.
  3. Architecture: Provides an overview of the solution’s architecture, including the high-level design of its infrastructure, software components, interfaces, and connectivity.
  4. Data Flow: Illustrates the flow of data through the solution, showing how information will be captured, processed, and transmitted between components.
  5. Integration Points: Identifies the external systems or applications that will interact with the solution, outlining the integration mechanisms and protocols.
  6. Security Considerations: Highlights the high-level security measures and controls that will be implemented to protect the solution and its data.
  7. Deployment Approach: Outlines the preferred approach for deploying and implementing the solution, including considerations for scalability, availability, and performance.

It’s important to note that a high-level solution design is not a detailed technical design, but rather a top-level overview intended to guide the subsequent design and development phases of the solution. It provides a common understanding and serves as a starting point for more detailed analysis, discussions, and refinement of the solution.

In summary, a high-level solution design is a strategic and conceptual overview of a proposed solution, outlining its major components, architecture, data flow, integration points, and deployment approach. It provides a top-level understanding of how the solution will address requirements and guides subsequent design efforts.