Functional Requirements Document - StressLess Platform

Purpose

This Functional Requirements Document (FRD) defines the functional specifications for StressLess, a privacy-first voice-based workplace stress monitoring platform. The document establishes detailed requirements for system functionality, user interactions, and technical capabilities based on comprehensive competitive analysis and industry best practices.[1][2][3]

Scope

StressLess is designed as a Progressive Web Application (PWA) that enables employees to assess stress levels through voice analysis while maintaining complete data privacy through local processing. The platform provides personalized stress management recommendations and anonymized organizational insights for HR and management teams.

Stakeholders

• Primary Users: Employees seeking stress monitoring and management tools

• Secondary Users: HR managers, team leaders, and organizational wellness coordinators

• System Administrators: IT departments responsible for deployment and maintenance

• Compliance Officers: Personnel ensuring GDPR and privacy regulation adherence

System Architecture

Client-Side Processing: All voice analysis performed locally using WebAssembly and TensorFlow.js implementations[4][5] Progressive Web Application: Cross-platform compatibility with native app-like experience[6][7] Privacy-by-Design: Zero external data transmission with complete local data processing[8][9] Cloud Infrastructure: Minimal cloud presence limited to application delivery and anonymous analytics aggregation

Key System Components

1. Voice Analysis Engine: Local ML models for stress detection

2. User Interface Layer: PWA frontend with responsive design

3. Data Management: Local storage with encryption and privacy controls

4. Analytics Engine: Personal and organizational insight generation

5. Integration Layer: APIs for enterprise system connectivity

FR-001: Voice Capture and Analysis

Requirement ID: FR-001
Priority: Must Have
Description: The system shall capture and analyze voice samples for stress level detection.

Detailed Requirements:

• FR-001.1: Capture high-quality audio samples with minimum 16kHz sampling rate for accurate voice analysis[10][11]

• FR-001.2: Process voice samples within 30-second recording windows for rapid assessment[1]

• FR-001.3: Extract acoustic features including fundamental frequency, jitter, shimmer, and spectral characteristics[12][13]

• FR-001.4: Apply noise reduction and signal enhancement algorithms for optimal analysis quality[10]

• FR-001.5: Support multiple audio input devices (built-in microphone, headset, external microphone)

Business Value: Enables core platform functionality with industry-leading assessment speed[1]

FR-002: Stress Detection Algorithm

Requirement ID: FR-002
Priority: Must Have
Description: The system shall implement machine learning algorithms for accurate stress level determination.

Detailed Requirements:

• FR-002.1: Achieve minimum 70% accuracy in stress level detection based on voice biomarkers[14][15]

• FR-002.2: Implement ECAPA-TDNN deep learning architecture for vocal biomarker analysis[14]

• FR-002.3: Provide stress level classification on scale of 1-10 with confidence scoring

• FR-002.4: Generate personalized baseline calibration through initial user assessment sessions

• FR-002.5: Continuously improve accuracy through federated learning approaches while maintaining privacy

Business Value: Delivers reliable stress assessment comparable to leading competitors[12][14][1]

FR-003: Local Data Processing

Requirement ID: FR-003
Priority: Must Have
Description: The system shall process all voice data locally without external transmission.

Detailed Requirements:

• FR-003.1: Execute all machine learning inference operations on user devices using WebAssembly[4]

• FR-003.2: Store voice analysis models locally with automatic updates via encrypted channels

• FR-003.3: Implement client-side feature extraction and pattern matching

• FR-003.4: Ensure zero raw audio data transmission to external servers or cloud services

• FR-003.5: Provide offline functionality for voice analysis without internet connectivity[5][4]

Business Value: Establishes competitive differentiation through superior privacy protection[9][8]

FR-004: Progressive Web Application

Requirement ID: FR-004
Priority: Must Have
Description: The system shall be delivered as a Progressive Web Application supporting all major platforms.

Detailed Requirements:

• FR-004.1: Support installation on desktop, mobile, and tablet devices from web browsers[6][4]

• FR-004.2: Implement service workers for offline functionality and background processing[5]

• FR-004.3: Provide native app-like experience with home screen installation capability[7]

• FR-004.4: Support push notifications for stress alerts and wellness reminders

• FR-004.5: Ensure responsive design compatibility across screen sizes from 320px to 4K displays

Business Value: Reduces deployment complexity and ensures broad device compatibility[7][5]

FR-005: User Authentication and Authorization

Requirement ID: FR-005
Priority: Must Have
Description: The system shall implement secure user authentication with role-based access control.

Detailed Requirements:

• FR-005.1: Support Single Sign-On (SSO) integration with enterprise identity providers (SAML, OIDC)[2]

• FR-005.2: Implement multi-factor authentication for enhanced security

• FR-005.3: Provide role-based access control with Employee, Manager, HR, and Admin roles[3][16]

• FR-005.4: Support guest/trial access for evaluation purposes with limited functionality

• FR-005.5: Enable self-service password recovery with secure verification methods

Business Value: Ensures secure access while integrating with existing enterprise authentication systems

FR-006: Personal Stress Dashboard

Requirement ID: FR-006
Priority: Must Have
Description: The system shall provide personalized stress insights and recommendations for individual users.

Detailed Requirements:

• FR-006.1: Display real-time stress level assessment results with confidence indicators[1]

• FR-006.2: Present historical stress patterns through interactive charts and trend analysis[17][3]

• FR-006.3: Generate personalized stress management recommendations based on individual patterns[18]

• FR-006.4: Provide wellness resource library with articles, exercises, and coping strategies

• FR-006.5: Enable goal setting and progress tracking for stress reduction objectives[19]

• FR-006.6: Offer customizable dashboard widgets with user-defined layout preferences[2]

Business Value: Empowers employees with actionable insights for proactive stress management

FR-007: Organizational Analytics

Requirement ID: FR-007
Priority: Should Have
Description: The system shall provide anonymized organizational stress insights for management and HR teams.

Detailed Requirements:

• FR-007.1: Generate team-level stress trend analysis with minimum group size of 3 employees[20][1]

• FR-007.2: Provide department and organizational stress benchmarking capabilities[2]

• FR-007.3: Implement predictive analytics for burnout risk identification with 30-day advance warning[21][22]

• FR-007.4: Create executive dashboards with high-level wellness KPIs and metrics[17]

• FR-007.5: Support custom reporting periods (daily, weekly, monthly, quarterly)[2]

• FR-007.6: Enable data export functionality for external analytics and compliance reporting

Business Value: Enables data-driven organizational wellness strategies and early intervention

FR-008: Privacy and Consent Management

Requirement ID: FR-008
Priority: Must Have
Description: The system shall implement comprehensive privacy controls and GDPR compliance mechanisms.

Detailed Requirements:

• FR-008.1: Provide granular consent management with opt-in/opt-out capabilities for each feature[23][9]

• FR-008.2: Implement data subject rights including access, correction, and deletion requests[24][25]

• FR-008.3: Support data portability with secure export functionality for user data

• FR-008.4: Maintain comprehensive audit logs for all data processing activities

• FR-008.5: Ensure automatic data purging according to configurable retention policies[8]

• FR-008.6: Provide transparency reporting on data usage and processing activities

Business Value: Ensures regulatory compliance and builds user trust through transparent privacy practices

FR-009: Real-Time Notifications and Alerts

Requirement ID: FR-009
Priority: Should Have
Description: The system shall provide intelligent notification system for stress management and wellness support.

Detailed Requirements:

• FR-009.1: Generate personalized stress alert notifications when thresholds are exceeded

• FR-009.2: Send wellness reminders and stress management tips based on user preferences[17]

• FR-009.3: Provide manager notifications for team stress trend changes (anonymized)[2]

• FR-009.4: Support multiple notification channels (in-app, email, push notifications)

• FR-009.5: Enable user-configurable notification preferences and frequency settings[26]

• FR-009.6: Implement intelligent timing to avoid notification fatigue

Business Value: Enables proactive intervention and maintains user engagement with wellness activities

FR-010: Enterprise System Integration

Requirement ID: FR-010
Priority: Should Have
Description: The system shall integrate with common enterprise systems and productivity tools.

Detailed Requirements:

• FR-010.1: Support Microsoft 365 integration for calendar and Teams connectivity[3][17][2]

• FR-010.2: Implement HRIS system integration for employee data synchronization[2]

• FR-010.3: Provide REST API for third-party wellness platform integration[16]

• FR-010.4: Support webhook notifications for external system event triggering

• FR-010.5: Enable SCIM provisioning for automated user lifecycle management

• FR-010.6: Implement data synchronization with existing Employee Assistance Programs (EAP)[19]

Business Value: Reduces administrative overhead and leverages existing organizational data investments

FR-011: Multi-Language Support

Requirement ID: FR-011
Priority: Could Have
Description: The system shall support multiple languages for diverse workplace environments.

Detailed Requirements:

• FR-011.1: Implement voice analysis models for English, Spanish, French, German, and Mandarin[1]

• FR-011.2: Provide user interface localization for supported languages

• FR-011.3: Support right-to-left languages (Arabic, Hebrew) with appropriate UI adaptations

• FR-011.4: Enable automatic language detection from voice samples

• FR-011.5: Maintain consistent stress detection accuracy across all supported languages

Business Value: Expands market reach and supports diverse global organizations

FR-012: Advanced Analytics and Insights

Requirement ID: FR-012
Priority: Could Have
Description: The system shall provide advanced predictive analytics and wellness insights.

Detailed Requirements:

• FR-012.1: Implement correlation analysis between stress levels and productivity metrics[27]

• FR-012.2: Provide environmental factor analysis (time of day, day of week, seasonal patterns)[17]

• FR-012.3: Generate wellness ROI calculations and cost-benefit analysis[28][29]

• FR-012.4: Support machine learning-based personalized intervention recommendations

• FR-012.5: Enable predictive modeling for organizational stress trend forecasting[30]

• FR-012.6: Provide benchmark comparisons against industry standards and peer organizations

Business Value: Delivers advanced insights for strategic wellness planning and ROI demonstration

Epic: Employee Stress Self-Assessment

US-001: Quick Stress Check
As an employee
I want to perform a 30-second voice-based stress assessment
So that I can quickly understand my current stress level and take appropriate action

Acceptance Criteria:

• Given I am logged into the StressLess platform

• When I click the "Quick Stress Check" button

• Then I should see recording instructions and a start button

• When I record my voice for 30 seconds

• Then I should receive stress level results within 5 seconds of completion

• And I should see a confidence score and personalized recommendations

• And no audio data should be transmitted to external servers

US-002: Stress History Review
As an employee
I want to view my stress level trends over time
So that I can identify patterns and monitor my wellness progress

Acceptance Criteria:

• Given I have completed multiple stress assessments

• When I navigate to my personal dashboard

• Then I should see a chart showing my stress levels over the past 30 days

• When I select different time periods (week, month, quarter)

• Then the chart should update to show the selected timeframe

• And I should be able to see correlations with calendar events and workload

Epic: Management Organizational Insights

US-003: Team Wellness Overview
As a team manager
I want to view anonymized stress trends for my team
So that I can identify when additional support may be needed

Acceptance Criteria:

• Given I have manager role permissions

• When I access the team dashboard

• Then I should see aggregated stress trends for my team (minimum 3 members)

• When stress levels show concerning trends

• Then I should receive anonymized alerts with suggested interventions

• And individual employee data should never be identifiable

US-004: Organizational Wellness Reporting
As an HR manager
I want to generate compliance-ready wellness reports
So that I can demonstrate program effectiveness and meet regulatory requirements

Acceptance Criteria:

• Given I have HR administrator permissions

• When I request an organizational wellness report

• Then I should receive a comprehensive report with aggregated metrics

• When I export the report

• Then it should include all necessary compliance documentation

• And all data should be fully anonymized and GDPR compliant

External System Integrations

Microsoft 365 Integration

• Interface Type: REST API and Graph API

• Data Exchange: Calendar events, Teams presence, user profile information[3][17]

• Authentication: OAuth 2.0 with organizational consent

• Frequency: Real-time for presence, daily sync for calendar data

HRIS System Integration

• Interface Type: REST API with SCIM provisioning

• Data Exchange: Employee hierarchies, role assignments, organizational structure[2]

• Authentication: Service account with role-based permissions

• Frequency: Daily synchronization with change-based updates

Enterprise Identity Providers

• Interface Type: SAML 2.0 and OpenID Connect

• Data Exchange: User authentication and authorization claims

• Authentication: Federated identity with SSO capabilities

• Frequency: Real-time authentication requests

Internal System Interfaces

Voice Analysis API

• Purpose: Interface between UI components and ML processing engine

• Protocol: Internal JavaScript API calls

• Data Format: Binary audio streams and JSON analysis results

• Performance: Sub-3-second response time requirement

Analytics Data Layer

• Purpose: Interface between user interactions and insights generation

• Protocol: Local database API (IndexedDB)

• Data Format: Structured JSON with temporal indexing

• Performance: Real-time data capture and sub-second query response

Data Entities

User Profile

• Attributes: UserID, Name, Email, Role, Department, Manager, Preferences, Consent Status

• Storage: Local device storage with encrypted backup

• Retention: Active employment + 30 days post-termination

• Privacy Level: Personal Identifiable Information (PII)

Voice Analysis Session

• Attributes: SessionID, Timestamp, Stress Level, Confidence Score, Analysis Duration

• Storage: Local device only, no cloud storage

• Retention: 90 days rolling window with user consent

• Privacy Level: Sensitive health data, GDPR Article 9 protection

Organizational Analytics

• Attributes: Department, Date, Aggregated Stress Level, Participation Rate, Trend Direction

• Storage: Encrypted cloud database with anonymization

• Retention: 2 years for trend analysis and compliance

• Privacy Level: Anonymized aggregate data, minimum group size 3

Data Processing Flows

Personal Assessment Flow

1. User initiates voice recording through PWA interface

2. Audio captured and processed locally using WebAssembly ML models

3. Stress analysis performed entirely on device

4. Results stored in local encrypted storage

5. Personalized insights generated and displayed

6. Anonymous statistical data aggregated for organizational insights

Organizational Reporting Flow

1. Anonymous user session data aggregated by department/team

2. Statistical analysis performed on aggregated data only

3. Trend analysis and predictive modeling applied

4. Compliance-ready reports generated with audit trails

5. Manager and HR dashboards updated with insights

6. Historical data archived according to retention policies

Response Time Requirements

Voice Analysis Processing: Maximum 3 seconds from recording completion to result display[1] Dashboard Loading: Maximum 2 seconds for personal dashboard rendering Report Generation: Maximum 10 seconds for standard organizational reports API Response: Maximum 500ms for user interface interactions Data Synchronization: Maximum 30 seconds for enterprise system sync

Scalability Requirements

Concurrent Users: Support 1,000+ simultaneous users per organization Data Volume: Handle 10,000+ voice assessments per day per organization Storage Growth: Accommodate 12 months of assessment data per user Geographic Distribution: Support multi-region deployments for global organizations

Availability Requirements

System Uptime: 99.5% availability during business hours (6 AM - 10 PM local time) Offline Functionality: Core voice analysis available without internet connectivity Recovery Time: Maximum 4 hours for complete system restoration Data Backup: Automated encrypted backups with 15-minute intervals

Data Protection Requirements

Encryption Standards: AES-256 encryption for data at rest, TLS 1.3 for data in transit Access Controls: Role-based access with principle of least privilege Audit Logging: Comprehensive audit trails for all data access and processing activities Data Minimization: Collection and processing of only necessary data for stated purposes[8]

Privacy Compliance Requirements

GDPR Compliance: Full adherence to European General Data Protection Regulation[9][23][8] Consent Management: Granular consent controls with easy withdrawal mechanisms[9] Data Subject Rights: Support for access, rectification, erasure, and portability requests[25][24] Privacy by Design: Built-in privacy protections at architecture level[8] Cross-Border Transfers: Compliance with international data transfer regulations

Security Monitoring Requirements

Threat Detection: Real-time monitoring for suspicious access patterns Vulnerability Management: Regular security assessments and patch management Incident Response: Defined procedures for security incident handling Compliance Monitoring: Automated compliance checking and reporting Third-Party Security: Security validation for all integrated external systems

Document Control
Next Review Date: September 27, 2025
Approval Required: Product Owner, Technical Lead, Privacy Officer
Distribution: Development Team, QA Team, Security Team, Legal Team

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