Defra AI in the SDLC Playbook

# Business Logic Technical Document Prompt

Please create an expert-level document that thoroughly explains the business logic of a software system. The document must provide an in-depth breakdown of not only **how** the business logic is implemented but also **why** it is designed and executed in that particular way. Use the outline below as your guide:

---

## 1. Introduction
- **Overview:**  
  Provide a brief summary of the software system and its purpose.
- **Purpose & Rationale:**  
  Explain the importance of the business logic within the system. Detail what problems it addresses and the benefits it offers to both the technical and business aspects.
- **Scope:**  
  Define which parts of the business logic will be covered and any boundaries of the discussion.

## 2. Business Logic Overview
- **Definition & Context:**  
  Describe what constitutes the business logic in the context of this system.
- **Core Objectives:**  
  List the primary goals of the business logic (e.g., automating business processes, enforcing business rules, managing workflows) and explain why they are crucial.

## 3. Detailed Business Processes & Workflows
- **Process Descriptions:**  
  Identify and describe each key business process or workflow implemented in the software.
- **Diagrams & Visuals:**  
  Include flowcharts, sequence diagrams, or other visuals that illustrate how data and control flow through these processes.
- **Implementation Details:**  
  Explain how these processes are implemented (e.g., through specific algorithms, patterns, or technologies).

## 4. Business Rules & Their Rationale
- **Rule Definitions:**  
  List the core business rules enforced by the system. For each rule, include:
  - **What:** A detailed description of the rule.
  - **How:** The technical implementation or mechanism that enforces the rule.
  - **Why:** The business reasoning behind the rule, including any historical context, regulatory requirements, or strategic objectives.
- **Alternative Approaches:**  
  Briefly mention any alternative solutions that were considered and why the chosen approach was selected.

## 5. Integration with Other System Components
- **Data and UI Interactions:**  
  Describe how the business logic interacts with other layers of the system (e.g., data access, user interface, external APIs).
- **Communication & Data Flow:**  
  Provide details on the data flow and communication patterns that support the business logic.
- **Rationale:**  
  Explain why these integrations are structured as they are and how they support overall system performance and reliability.

## 6. Error Handling & Exception Management in Business Processes
- **Error Handling Strategies:**  
  Detail how errors or exceptions are managed within the business logic.
- **Impact on Business Rules:**  
  Describe how the error handling mechanism supports or enforces business rules.
- **Justification:**  
  Explain why these error handling approaches were chosen and their impact on system stability.

## 7. Security & Compliance Considerations
- **Security Measures:**  
  Outline any security practices related to the business logic (e.g., input validation, authorization checks).
- **Compliance:**  
  Mention any regulatory or compliance requirements that influence the business logic.
- **Rationale:**  
  Explain why these security and compliance measures are critical for the business context.

## 8. Testing & Validation of Business Logic
- **Testing Strategy:**  
  Describe how the business logic is tested (unit tests, integration tests, end-to-end tests).
- **Example Test Cases:**  
  Provide a few example scenarios or test cases, explaining what each validates.
- **Rationale:**  
  Explain the importance of these tests and why the chosen testing methods are effective for validating business processes.

## 9. Examples & Use Cases
- **Real-World Scenarios:**  
  Provide practical examples or case studies that demonstrate how the business logic operates in typical business situations.
- **Code Samples & Pseudocode:**  
  Include relevant snippets of code or pseudocode to illustrate key parts of the business logic.
- **Explanation:**  
  For each example, discuss both how the implementation works and why it effectively addresses the business needs.

## 10. Conclusion
- **Summary:**  
  Recap the key points about how the business logic is structured and why these choices were made.
- **Future Considerations:**  
  Mention any areas for potential improvements or further evolution of the business logic based on changing business requirements.

---

Ensure that throughout the document, every section clearly breaks down both **how** the business logic is implemented and **why** each design decision was made. This dual perspective will help both technical and non-technical stakeholders understand the system’s operations and underlying business strategies.