Work Breakdown Structure (WBS) with TDD Approach

1.1.1 Create project repository and CI/CD pipeline

1.1.2 Define coding standards and TDD guidelines

1.1.3 Set up development environment templates

1.1.4 Create project documentation structure

1.1.5 Define testing strategy with Gherkin/Cucumber integration

1.2.1 Onboard team members to TDD and Gherkin approach

1.2.2 Configure development tools (Cursor, Android Studio, Cucumber)

1.2.3 Set up communication channels and daily standups

1.2.4 Assign role responsibilities and code ownership

2.1.1 Create onboarding.feature - User onboarding and consent scenarios

2.1.2 Create model_selection.feature - Model download and initialization

2.1.3 Create home_dashboard.feature - Home screen and navigation

2.1.4 Create voice_check.feature - Voice recording and analysis

2.1.5 Create results.feature - Result display and recommendations

2.1.6 Create history_trends.feature - History and trend visualization

2.1.7 Create settings_privacy.feature - Settings and data management

2.1.8 Create hardware_performance.feature - NPU and performance scenarios

2.1.9 Create offline_security.feature - Offline and security scenarios

2.2.1 Create Cucumber test runner configuration

2.2.2 Implement step definition stubs for all features

2.2.3 Set up test data and mocking framework

3.1.1 Create Android project with Kotlin and Compose (following TDD)

3.1.2 Configure Gradle build system with testing dependencies

3.1.3 Set up modular architecture (app, data, domain, ui, ml modules)

3.1.4 Implement dependency injection with Hilt

3.1.5 Configure test runners (unit, integration, Cucumber)

3.2.1 Implement encrypted SQLite database with Room (test-first)

3.2.2 Create data models and entities with validation tests

3.2.3 Set up DataStore for app preferences (test coverage)

3.2.4 Implement logging and crash reporting

3.2.5 Configure WorkManager for background tasks

3.3.1 Implement Android Keystore integration (test-first)

3.3.2 Create encryption utilities with unit tests

3.3.3 Set up GDPR compliance framework

3.3.4 Implement data export/deletion with scenario validation

4.1.1 Research and select ECAPA-TDNN model variants

4.1.2 Convert models to LiteRT format with validation tests

4.1.3 Quantize models for mobile deployment

4.1.4 Create model asset management system (test-first)

4.1.5 Implement model integrity validation

4.2.1 Implement device capability detection (test-driven)

4.2.2 Add Qualcomm NPU delegate integration

4.2.3 Add MediaTek NPU delegate support

4.2.4 Create fallback mechanism (GPU → CPU) with tests

4.2.5 Optimize delegate selection logic

4.2.6 Performance benchmarking with automated tests

4.3.1 Implement ModelLoader with caching (test-first)

4.3.2 Create ECAPAStressEngine class with unit tests

4.3.3 Implement embedding extraction pipeline

4.3.4 Build stress classification logic with validation

4.3.5 Add confidence scoring and error handling

4.4.1 Implement audio recording with test mocks

4.4.2 Create audio preprocessing utilities (test-driven)

4.4.3 Implement MFCC feature extraction with validation

4.4.4 Add noise filtering and normalization

4.4.5 Optimize audio buffer management

5.1.1 Implement StressAnalysisManager orchestrator (test-first)

5.1.2 Create PrivacyController for GDPR compliance

5.1.3 Build LocalStressRepository with integration tests

5.1.4 Create wellness recommendation engine

5.1.5 Add performance monitoring utilities

5.2.1 Implement DAOs and database operations (test-driven)

5.2.2 Create data migration strategies with tests

5.2.3 Build export/import functionality

5.2.4 Add data validation and integrity checks

6.1.1 Create Material 3 design tokens

6.1.2 Implement custom theme and typography

6.1.3 Build reusable UI components with Compose tests

6.1.4 Create accessibility guidelines

6.1.5 Implement dark/light theme support

6.2.1 Implement welcome screens (guided by Gherkin scenarios)

6.2.2 Create EULA and consent forms

6.2.3 Build language selection interface

6.2.4 Implement model download screen with progress

6.2.5 Add onboarding completion state management

6.2.6 Validate all onboarding Gherkin scenarios pass

6.3.1 Build Home Dashboard (validate dashboard scenarios)

6.3.2 Create Voice Check recording overlay (test recording scenarios)

6.3.3 Implement Stress Result display screen

6.3.4 Build History and Trends visualization (history scenarios)

6.3.5 Create Settings and Privacy screens (settings scenarios)

6.3.6 Implement navigation and state management

6.4.1 Create voice recording controls with UI tests

6.4.2 Build waveform visualization

6.4.3 Implement progress indicators

6.4.4 Add context tagging interface

7.1.1 Execute all Gherkin scenarios end-to-end

7.1.2 Validate onboarding and model selection flows

7.1.3 Test voice check and result display scenarios

7.1.4 Verify history, settings, and privacy scenarios

7.1.5 Test hardware performance and offline scenarios

7.2.1 Benchmark inference times across devices (<3s requirement)

7.2.2 Memory usage optimization testing (<200MB)

7.2.3 Battery consumption analysis (<2% per analysis)

7.2.4 NPU delegate performance validation

7.3.1 Verify data encryption implementation

7.3.2 Test GDPR compliance features (export/delete)

7.3.3 Validate offline functionality scenarios

7.3.4 Privacy controls validation

8.1.1 Execute all Gherkin scenarios manually

8.1.2 Device compatibility testing

8.1.3 Edge case and error scenario testing

8.1.4 Accessibility testing (screen reader, contrast)

8.2.1 Optimize model loading and caching

8.2.2 Reduce memory footprint

8.2.3 Improve startup time

8.2.4 Optimize battery usage

9.1.1 Configure release build variants

9.1.2 Implement app signing and security

9.1.3 Optimize APK size and resources (<50MB)

9.1.4 Final Gherkin scenario validation

9.1.5 Create release documentation

9.2.1 Deploy to internal testing track

9.2.2 Stakeholder review sessions

9.2.3 Critical bug fixes if needed

9.2.4 Performance validation on target devices