# Software Requirements Specification (SRS)
# Healthcare RCM AR Follow-Up Engine

**Document Version:** 1.0  
**Date:** August 1, 2025  
**Project:** Healthcare Revenue Cycle Management Accounts Receivable Follow-Up Engine  

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## Table of Contents

1. [Introduction](#1-introduction)
2. [Overall Description](#2-overall-description)
3. [System Features](#3-system-features)
4. [External Interface Requirements](#4-external-interface-requirements)
5. [Functional Requirements](#5-functional-requirements)
6. [Non-Functional Requirements](#6-non-functional-requirements)
7. [Data Requirements](#7-data-requirements)
8. [Technical Architecture](#8-technical-architecture)
9. [Security Requirements](#9-security-requirements)
10. [Performance Requirements](#10-performance-requirements)
11. [Deployment Requirements](#11-deployment-requirements)

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## 1. Introduction

### 1.1 Purpose
This Software Requirements Specification (SRS) document describes the functional and non-functional requirements for the Healthcare Revenue Cycle Management (RCM) Accounts Receivable (AR) Follow-Up Engine. The system is designed to streamline claim processing, optimize revenue recovery, and provide intelligent automation for healthcare organizations.

### 1.2 Scope
The AR Follow-Up Engine is a comprehensive web-based application that:
- Automates claim categorization and aging bucket assignment
- Provides intelligent agent assignment based on business rules
- Offers real-time dashboard visualization and analytics
- Implements AI-powered claim prioritization
- Supports CSV data import and processing
- Delivers role-based access control and workflow management

### 1.3 Product Overview
The system serves as a competitive alternative to industry leaders like Epic Resolute and Waystar, providing healthcare organizations with:
- Automated claim processing and categorization
- Smart prioritization algorithms
- Real-time performance analytics
- Streamlined workflow management
- Professional healthcare-focused user interface

### 1.4 Definitions and Acronyms
- **AR**: Accounts Receivable
- **RCM**: Revenue Cycle Management
- **SLA**: Service Level Agreement
- **CSV**: Comma-Separated Values
- **JWT**: JSON Web Token
- **API**: Application Programming Interface
- **UI/UX**: User Interface/User Experience

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## 2. Overall Description

### 2.1 Product Perspective
The AR Follow-Up Engine is a standalone web application that integrates with existing healthcare revenue cycle management workflows. It serves as a centralized platform for managing outstanding insurance claims and optimizing collection processes.

### 2.2 Product Functions
**Core Functions:**
- Automated claim data processing and validation
- Intelligent aging bucket categorization (0-30, 31-60, 61-90, 91-120, >120 days)
- AI-powered priority scoring and claim ranking
- Agent assignment based on configurable business rules
- Real-time dashboard with interactive charts and statistics
- CSV file upload and data import capabilities
- Role-based user authentication and authorization

### 2.3 User Classes
**Primary Users:**
1. **System Administrators** - Full system access, user management, configuration
2. **AR Managers** - Dashboard oversight, performance monitoring, strategic planning
3. **Collection Agents** - Claim processing, status updates, follow-up activities
4. **Senior Agents** - High-value claim handling, escalation management
5. **Government Specialists** - Medicare/Medicaid claim expertise

### 2.4 Operating Environment
- **Platform**: Web-based application (cross-platform compatibility)
- **Browsers**: Chrome, Firefox, Safari, Edge (latest versions)
- **Database**: PostgreSQL
- **Runtime**: Python 3.11+ with FastAPI framework
- **Deployment**: Replit cloud platform

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## 3. System Features

### 3.1 Authentication & Authorization System
**Description**: Secure user authentication with role-based access control
**Priority**: High
**Functional Requirements**:
- JWT-based authentication with 24-hour token expiration
- Bcrypt password hashing for security
- Role-based permissions (Admin, Agent, Manager)
- Session management with automatic logout
- User profile management

### 3.2 Dashboard & Analytics
**Description**: Real-time visualization and performance metrics
**Priority**: High
**Functional Requirements**:
- Priority Summary Dashboard with real-time counts
- Interactive aging bucket charts using Chart.js
- Top Payers analysis with financial metrics
- Quick action buttons for workflow optimization
- Color-coded visual indicators for priority levels
- Responsive design for mobile and desktop access

### 3.3 Smart Claim Prioritization
**Description**: AI-powered automated priority scoring system
**Priority**: High
**Functional Requirements**:
- Four-tier priority system: Critical (70+), High (50-69), Medium (30-49), Low (<30)
- Multi-factor scoring algorithm considering:
  - Claim value and financial impact
  - Aging days and time sensitivity
  - Payer difficulty and collection history
  - Current claim status
- Visual priority indicators with color-coded badges
- Priority-based filtering and sorting capabilities
- Automatic priority recalculation on data updates

### 3.4 Automated Agent Assignment
**Description**: Business rule-driven claim assignment system
**Priority**: High
**Functional Requirements**:
- High-value claims (>$1000) → Senior Agent assignment
- Aged claims (>90 days) → Escalation Team routing
- Government payers (Medicare/Medicaid) → Government Specialist assignment
- Default cases → General Agent distribution
- Configurable assignment rules and thresholds
- Load balancing across available agents

### 3.5 CSV Data Import & Processing
**Description**: Flexible data import with validation and error handling
**Priority**: High
**Functional Requirements**:
- Support for multiple CSV column name variations
- Flexible column mapping (ClaimID/Claim ID/Claim_ID, etc.)
- Data validation and error reporting
- Duplicate detection and handling
- Batch processing for large datasets
- Sample CSV template download
- Import status tracking and notifications

### 3.6 Claim Management System
**Description**: Comprehensive claim tracking and status management
**Priority**: High
**Functional Requirements**:
- Inline editing of claim status with dropdown selection
- Remarks text area for notes and follow-up actions
- Real-time updates with success/error notifications
- Auto-refresh of dashboard statistics after updates
- Claim history tracking and audit trail
- Bulk operations for multiple claims

### 3.7 Enhanced SLA Tracking
**Description**: Service level agreement monitoring and alerts
**Priority**: Medium
**Functional Requirements**:
- Color-coded aging alerts: Green (0-30 days), Amber (31-60 days), Red (61+ days)
- High-value breach detection for claims >$5000 with SLA violations
- Visual indicators and dashboard metrics for urgent cases
- Automated escalation workflows
- SLA performance reporting

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## 4. External Interface Requirements

### 4.1 User Interface Requirements
**Design Standards**:
- Healthcare professional color palette for industry familiarity
- Responsive Bootstrap 5 framework for cross-device compatibility
- Accessibility compliance (WCAG 2.1 Level AA)
- Professional medical industry aesthetics
- Intuitive navigation and workflow design

**Color Scheme**:
- Critical Priority: #DC2626 (Medical alert red)
- High Priority: #F59E0B (Caution amber)
- Medium Priority: #0EA5E9 (Professional sky blue)
- Low Priority: #059669 (Success emerald green)
- Background: #F8FAFC (Clean medical white)
- Text: #0F172A (High contrast black)

### 4.2 Software Interface Requirements
**Database Interface**:
- PostgreSQL database connectivity via SQLAlchemy ORM
- Environment-based configuration (DATABASE_URL)
- Connection pooling and transaction management

**API Interface**:
- RESTful API endpoints for all data operations
- JSON data format for client-server communication
- OpenAPI/Swagger documentation generation

### 4.3 Communication Interface Requirements
- HTTPS protocol for secure data transmission
- WebSocket support for real-time updates (future enhancement)
- Standard HTTP status codes and error responses

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## 5. Functional Requirements

### 5.1 User Authentication (AUTH-001 to AUTH-005)
**AUTH-001**: User Login
- System shall authenticate users with username/password credentials
- System shall generate JWT tokens upon successful authentication
- System shall validate token expiration and renewal

**AUTH-002**: Role-Based Access
- System shall enforce role-based permissions (Admin, Agent, Manager)
- System shall restrict feature access based on user roles
- System shall provide different dashboard views per role

**AUTH-003**: Password Security
- System shall hash passwords using bcrypt algorithm
- System shall enforce password complexity requirements
- System shall support password reset functionality

**AUTH-004**: Session Management
- System shall maintain secure session state
- System shall automatically log out expired sessions
- System shall support concurrent user sessions

**AUTH-005**: User Profile Management
- System shall allow users to update profile information
- System shall track user activity and login history
- System shall support user deactivation/reactivation

### 5.2 Dashboard Functionality (DASH-001 to DASH-008)
**DASH-001**: Priority Summary Display
- System shall display real-time claim counts by priority level
- System shall provide one-click filtering by priority
- System shall show percentage distribution across priority levels

**DASH-002**: Financial Metrics
- System shall calculate and display total outstanding balance
- System shall show total claim count across all statuses
- System shall provide financial trend analysis

**DASH-003**: Interactive Charts
- System shall render aging bucket distribution charts
- System shall display top payers with claim counts and balances
- System shall support chart interaction and drill-down

**DASH-004**: Quick Actions
- System shall provide quick access to critical claims
- System shall support overdue claim filtering (>120 days)
- System shall enable one-click workflow shortcuts

**DASH-005**: Real-Time Updates
- System shall refresh dashboard data automatically
- System shall reflect changes immediately after updates
- System shall maintain data consistency across user sessions

**DASH-006**: Responsive Design
- System shall adapt to different screen sizes and devices
- System shall maintain functionality on mobile devices
- System shall provide touch-friendly interface elements

**DASH-007**: Visual Indicators
- System shall use color-coded priority indicators
- System shall provide progress bars for metrics visualization
- System shall implement consistent visual hierarchy

**DASH-008**: Performance Optimization
- System shall load dashboard data within 3 seconds
- System shall implement efficient data caching
- System shall minimize database queries for performance

### 5.3 Claim Processing (CLAIM-001 to CLAIM-010)
**CLAIM-001**: Automated Prioritization
- System shall calculate priority scores based on multiple factors
- System shall assign priority levels (Critical, High, Medium, Low)
- System shall update priorities when claim data changes

**CLAIM-002**: Aging Bucket Assignment
- System shall categorize claims into aging buckets automatically
- System shall support configurable aging bucket thresholds
- System shall track aging progression over time

**CLAIM-003**: Agent Assignment Rules
- System shall assign claims to appropriate agents based on business rules
- System shall support configurable assignment criteria
- System shall balance workload across available agents

**CLAIM-004**: Status Management
- System shall support multiple claim status types
- System shall track status change history
- System shall validate status transitions

**CLAIM-005**: Bulk Operations
- System shall support bulk status updates
- System shall enable bulk agent reassignment
- System shall provide bulk export functionality

**CLAIM-006**: Search and Filtering
- System shall provide advanced search capabilities
- System shall support multi-criteria filtering
- System shall maintain filter state across sessions

**CLAIM-007**: Data Validation
- System shall validate claim data integrity
- System shall check for required field completeness
- System shall detect and flag data anomalies

**CLAIM-008**: Audit Trail
- System shall log all claim modifications
- System shall track user actions and timestamps
- System shall provide audit report generation

**CLAIM-009**: Export Functionality
- System shall support data export in multiple formats
- System shall maintain data formatting in exports
- System shall include audit information in exports

**CLAIM-010**: Integration Support
- System shall provide API endpoints for external integration
- System shall support webhook notifications for events
- System shall maintain data synchronization capabilities

### 5.4 Data Import (IMPORT-001 to IMPORT-006)
**IMPORT-001**: CSV File Processing
- System shall accept CSV files with flexible column naming
- System shall validate file format and structure
- System shall provide detailed error reporting for invalid data

**IMPORT-002**: Column Mapping
- System shall automatically detect column types
- System shall support manual column mapping configuration
- System shall handle variations in column naming conventions

**IMPORT-003**: Data Validation
- System shall validate data types and formats
- System shall check for required field presence
- System shall detect and report duplicate entries

**IMPORT-004**: Batch Processing
- System shall process large datasets efficiently
- System shall provide progress tracking for imports
- System shall support resume functionality for interrupted imports

**IMPORT-005**: Error Handling
- System shall provide detailed error messages
- System shall allow partial import with error exclusion
- System shall generate error reports for failed records

**IMPORT-006**: Sample Templates
- System shall provide downloadable CSV templates
- System shall include example data in templates
- System shall document required column formats

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## 6. Non-Functional Requirements

### 6.1 Performance Requirements
**PERF-001**: Response Time
- Dashboard shall load within 3 seconds under normal load
- API responses shall complete within 2 seconds for standard operations
- Large dataset operations shall provide progress indicators

**PERF-002**: Throughput
- System shall support simultaneous processing of 10,000+ claims
- System shall handle 100+ concurrent users
- CSV import shall process 1000+ records per minute

**PERF-003**: Scalability
- System shall scale horizontally with additional server instances
- Database shall support partitioning for large datasets
- Application shall implement efficient caching strategies

### 6.2 Reliability Requirements
**REL-001**: Availability
- System shall maintain 99.5% uptime during business hours
- System shall implement graceful degradation for component failures
- System shall provide automatic backup and recovery procedures

**REL-002**: Data Integrity
- System shall ensure ACID compliance for all transactions
- System shall implement data validation at all input points
- System shall maintain referential integrity across all data relationships

**REL-003**: Error Recovery
- System shall recover gracefully from unexpected errors
- System shall log all errors for debugging and monitoring
- System shall provide user-friendly error messages

### 6.3 Security Requirements
**SEC-001**: Authentication
- System shall implement strong password policies
- System shall use industry-standard JWT authentication
- System shall support multi-factor authentication (future enhancement)

**SEC-002**: Authorization
- System shall enforce role-based access controls
- System shall validate permissions for all operations
- System shall log all security-related events

**SEC-003**: Data Protection
- System shall encrypt sensitive data at rest
- System shall use HTTPS for all client-server communication
- System shall comply with HIPAA requirements for healthcare data

### 6.4 Usability Requirements
**USA-001**: Ease of Use
- System shall provide intuitive navigation for all user types
- System shall minimize clicks required for common operations
- System shall provide contextual help and guidance

**USA-002**: Accessibility
- System shall comply with WCAG 2.1 Level AA standards
- System shall support screen readers and assistive technologies
- System shall provide keyboard navigation alternatives

**USA-003**: Training Requirements
- System shall be learnable by new users within 2 hours
- System shall provide comprehensive user documentation
- System shall include interactive tutorials for key workflows

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## 7. Data Requirements

### 7.1 Data Entities
**User Entity**:
- user_id (Primary Key)
- username (Unique)
- email
- password_hash
- role (Admin/Agent/Manager)
- created_at
- last_login
- is_active

**Claim Entity**:
- claim_id (Primary Key)
- claim_number (Unique)
- payer_name
- balance_amount
- aging_days
- status
- priority_score
- priority_level
- assigned_agent_id (Foreign Key)
- created_at
- updated_at
- remarks

### 7.2 Data Volume Estimates
- Users: 100-500 active users
- Claims: 10,000-100,000 active claims
- Historical Data: 5+ years retention
- Daily Transactions: 1,000-5,000 updates

### 7.3 Data Quality Requirements
- Completeness: 99.5% of required fields populated
- Accuracy: 99.9% data accuracy rate
- Consistency: Real-time synchronization across all components
- Timeliness: Data updates reflected within 5 seconds

### 7.4 Data Backup and Recovery
- Daily automated backups with 30-day retention
- Point-in-time recovery capability
- Geographic redundancy for disaster recovery
- Recovery time objective (RTO): 4 hours
- Recovery point objective (RPO): 1 hour

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## 8. Technical Architecture

### 8.1 System Architecture
**Frontend Layer**:
- Single Page Application (SPA) using vanilla JavaScript
- Bootstrap 5 for responsive UI framework
- Chart.js for data visualization
- Font Awesome for iconography

**Backend Layer**:
- FastAPI framework with Python 3.11+
- SQLAlchemy ORM for database operations
- Pydantic for data validation
- JWT authentication with PassLib

**Database Layer**:
- PostgreSQL for primary data storage
- Connection pooling for performance
- Indexing strategy for query optimization

**Infrastructure Layer**:
- Replit cloud platform deployment
- Environment-based configuration management
- Static file serving through FastAPI

### 8.2 Technology Stack
**Backend Technologies**:
- Python 3.11+
- FastAPI (Web Framework)
- SQLAlchemy (ORM)
- PostgreSQL (Database)
- Pandas (Data Processing)
- PyJWT (Authentication)
- PassLib (Password Hashing)
- Python-Multipart (File Upload)

**Frontend Technologies**:
- Vanilla JavaScript (ES6+)
- Bootstrap 5 (UI Framework)
- Chart.js (Data Visualization)
- Font Awesome (Icons)
- CSS3 (Styling)

**Development Tools**:
- Git (Version Control)
- UV/Pip (Package Management)
- Replit (Development Environment)

### 8.3 Database Design
**Primary Tables**:
- users (Authentication and user management)
- claims (Core claim data and processing)
- audit_log (Activity tracking and compliance)

**Relationships**:
- One-to-Many: Users to Claims (assigned_agent)
- One-to-Many: Claims to Audit_Log (claim_id)

**Indexing Strategy**:
- Primary keys and foreign keys
- Frequently queried columns (payer_name, status, priority_level)
- Composite indexes for complex queries

---

## 9. Security Requirements

### 9.1 Authentication Security
- JWT tokens with 24-hour expiration
- Bcrypt password hashing with salt
- Session invalidation on logout
- Protection against brute force attacks

### 9.2 Authorization Security
- Role-based access control (RBAC)
- Principle of least privilege
- Resource-level permissions
- API endpoint protection

### 9.3 Data Security
- HTTPS encryption for all communications
- Input validation and sanitization
- SQL injection prevention
- Cross-site scripting (XSS) protection
- Cross-site request forgery (CSRF) protection

### 9.4 Compliance Requirements
- HIPAA compliance for healthcare data
- SOC 2 Type II compliance considerations
- Data retention and purging policies
- Audit logging for compliance reporting

---

## 10. Performance Requirements

### 10.1 Response Time Requirements
- Page Load Time: < 3 seconds
- API Response Time: < 2 seconds
- Database Query Time: < 1 second
- File Upload Processing: < 30 seconds for 10MB files

### 10.2 Throughput Requirements
- Concurrent Users: 100+ simultaneous users
- Transaction Rate: 1000+ operations per minute
- Data Processing: 10,000+ records per batch
- API Requests: 100+ requests per second

### 10.3 Resource Requirements
- Memory Usage: < 2GB per application instance
- CPU Utilization: < 80% under normal load
- Storage Growth: < 100GB per year
- Network Bandwidth: < 10Mbps per user

### 10.4 Scalability Requirements
- Horizontal scaling capability
- Load balancing support
- Database partitioning strategy
- Caching implementation for performance optimization

---

## 11. Deployment Requirements

### 11.1 Platform Requirements
- Replit cloud platform deployment
- PostgreSQL database service
- Python 3.11+ runtime environment
- HTTPS certificate management

### 11.2 Environment Configuration
- Environment variables for sensitive configuration
- Separate development, staging, and production environments
- Configuration management for different deployment stages
- Monitoring and logging setup

### 11.3 Deployment Process
- Automated deployment through Replit workflows
- Zero-downtime deployment strategy
- Database migration management
- Rollback procedures for failed deployments

### 11.4 Monitoring and Maintenance
- Application performance monitoring
- Error tracking and alerting
- Log aggregation and analysis
- Regular security updates and patches

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## Conclusion

This Software Requirements Specification provides a comprehensive overview of the Healthcare RCM AR Follow-Up Engine's functional and non-functional requirements. The system delivers a professional, healthcare-focused solution for revenue cycle management with intelligent automation, real-time analytics, and streamlined workflow optimization.

The implementation successfully addresses the key challenges in healthcare accounts receivable management while providing a scalable, secure, and user-friendly platform that can compete with industry-leading solutions.

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**Document Control**
- **Created By:** AI Assistant (Replit)
- **Approved By:** [To be filled by project stakeholder]
- **Next Review Date:** [To be scheduled]
- **Distribution:** Project Team, Stakeholders, Development Team