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Software Development Lifecycle
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**Real-Life Example:** Food Delivery App (like Uber Eats or DoorDash)

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1. Planning
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**Goal:**  
Understand what the business and users need.

**Activities:**
- Conduct market research to identify user demands (e.g., real-time tracking).
- Define project scope, cost, and timeline.
- Decide on platforms (Android, iOS, web).

**Deliverables:**  
Project plan, feasibility study, requirements outline.

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2. Requirements Analysis
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**Goal:**  
Gather detailed requirements from stakeholders.

**Activities:**
- Interview restaurant partners, drivers, and customers.
- Write user stories:
    - “As a customer, I want to track my order so I know when it will arrive.”
    - “As a driver, I want to receive route suggestions for faster delivery.”

**Deliverables:**  
Software Requirements Specification (SRS) document.

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3. Design
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**Goal:**  
Plan how the system will look and function technically.

**Activities:**
- UI/UX team creates wireframes and mockups for the app.
- Developers design system architecture:
    - Frontend (mobile app)
    - Backend (APIs, database, authentication)
    - Integrations (maps, payment gateways)

**Deliverables:**  
Design documents, database schema, prototypes.

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4. Implementation (Development)
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**Goal:**  
Build the actual product.

**Activities:**
- Developers write code for the customer, restaurant, and driver apps.
- Backend team builds APIs and sets up servers.
- Use version control (Git) for collaboration.

**Deliverables:**  
Working code modules, initial builds.

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5. Testing
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**Goal:**  
Ensure the software works correctly and is bug-free.

**Activities:**
- QA team runs test cases for login, order placement, and payments.
- Conduct usability testing with real users.
- Fix bugs and optimize performance.

**Deliverables:**  
Test reports, bug fixes, stable release candidate.

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6. Deployment
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**Goal:**  
Release the app for public use.

**Activities:**
- Deploy the backend to cloud servers (AWS, Google Cloud).
- Publish apps on Google Play and the App Store.
- Monitor performance and gather user feedback.

**Deliverables:**  
Live version of the app.

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7. Maintenance
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**Goal:**  
Keep the app running smoothly and up to date.

**Activities:**
- Monitor for crashes and security issues.
- Release updates with new features (e.g., coupon system).
- Fix bugs reported by users.

**Deliverables:**  
Updated versions, performance reports, ongoing support.

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Summary Table
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.. list-table::
   :header-rows: 1
   :widths: 20 50 30

   * - **Phase**
     - **Main Activities**
     - **Example Deliverable**
   * - Planning
     - Define goals and scope
     - Project Plan
   * - Requirements
     - Gather user needs
     - SRS Document
   * - Design
     - Create architecture and UI
     - Wireframes, Schematics
   * - Implementation
     - Write and integrate code
     - Working App
   * - Testing
     - Find and fix bugs
     - Test Reports
   * - Deployment
     - Release product
     - Live App
   * - Maintenance
     - Update and support
     - New Features, Bug Fixes