Online ROM Calculator

A rough order of magnitude (ROM) cost estimator for GenAI project setup and implementation expenses.

Features

• Real-time Calculation: Instantly see cost estimates as you adjust project parameters
• Save & Compare: Save multiple scenarios and compare them side-by-side
• View Saved Scenarios: Load any saved scenario back into the calculator to review details or make modifications
• Bulk Delete: Select multiple scenarios at once using checkboxes and delete them in bulk with a single action
• Export: Download estimates as CSV or text files for sharing
• Tooltips: Helpful explanations for every input field
• Responsive Design: Works on desktop and mobile devices
• Accessibility: WCAG 2.1 AA compliant

Getting Started

Prerequisites

• Node.js 16+ and npm

Installation

npm install

Running the App

npm start

Opens the app at http://localhost:3000

Running Tests

npm test

Building for Production

npm build

Usage

1. Create an Estimate: Enter your project details including scope, integrations, data complexity, security requirements, team approach, and model approach
2. View Results: See most-likely, low, and high ROM estimates calculated in real-time
3. Save Scenarios: Save your estimate for future reference
4. View Saved Scenarios: Click the "View" button on any saved scenario to load all its details back into the calculator for review or modification
5. Bulk Delete: Select multiple scenarios using checkboxes and click "Delete Selected" to remove them all at once
6. Compare: Select multiple saved scenarios to compare them side-by-side
7. Export: Download results as CSV or text files

Input Parameters

• Scope: Project size (Small: 1-2 workflows, Medium: 3-4, Large: 5+)
• Integrations: Number of system integrations (Few: 0-1, Some: 2-3, Many: 4+)
• Data Complexity: Data handling requirements (Low, Medium, High)
• Security & Compliance: Security requirements (Basic, Standard, Strict)
• Team Approach: Development team structure (In-house, Mixed, Partner-led)
• Model Approach: AI model strategy (API-only, Light tuning, Fine-tuning)
• Base Cost: Starting cost estimate in thousands of USD

Calculation Logic

The calculator applies multipliers based on your selections:

• Scope: 1.0 (Small), 1.1 (Medium), 1.25 (Large)
• Integrations: 1.0 (Few), 1.1 (Some), 1.25 (Many)
• Data Complexity: 1.0 (Low), 1.2 (Medium), 1.5 (High)
• Security: 1.0 (Basic), 1.1 (Standard), 1.3 (Strict)
• Team: 1.0 (In-house), 1.1 (Mixed), 1.2 (Partner-led)
• Model: 1.0 (API-only), 1.15 (Light tuning), 1.35 (Fine-tuning)

Most-likely estimate = Base Cost × all multipliers
Low estimate = Most-likely × 0.8
High estimate = Most-likely × 1.3

Tech Stack

• React 18
• JavaScript (ES2020+)
• CSS (responsive, mobile-first)
• LocalStorage for data persistence
• FileSaver.js for exports
• Jest + React Testing Library for testing

Project Structure

src/
  components/
    CalculatorForm.jsx    # Main input form and calculation display
    ScenarioList.jsx      # List of saved scenarios
    ScenarioCompare.jsx   # Side-by-side comparison view
    ExportButton.jsx      # CSV/text export functionality
    Tooltip.jsx           # Help tooltips for inputs
  utils/
    calculation.js        # ROM calculation and validation logic
    storage.js            # LocalStorage persistence utilities
    models.js             # Data model definitions
  styles/
    index.css             # Global styles
  App.jsx                 # Main app component
  index.jsx               # React entry point
tests/                    # Unit and integration tests

Contributing

1. Follow the code style (ESLint + Prettier configured)
2. Write tests for new features
3. Ensure 90%+ test coverage
4. Follow accessibility guidelines (WCAG 2.1 AA)

License

MIT