Software Requirements Specification (SRS) for LTV (Loan-to-Value) Calculator
Introduction
Purpose:
The purpose of this document is to define the requirements for the development of an LTV (Loan-to-Value) Calculator. This web-based application aims to assist users in understanding the loan-to-value ratio for mortgages and other secured loans.
Scope:
The LTV Calculator will provide users with an intuitive interface to input loan and property details and calculate the loan-to-value ratio. The application will support various types of secured loans, including mortgages and car loans.
System Overview
System Description:
The system will be a client-server application. Users will access the LTV Calculator through a web browser. The server will handle the logic for LTV ratio calculations.
System Architecture:
The application will follow a three-tier architecture: presentation layer (client-side browser), application layer (server-side processing), and data layer (storage and retrieval of data).
Functional Requirements
Use Cases:
Calculate Loan-to-Value Ratio:
- Users can input loan details such as loan amount and property details such as property value.
- The system will calculate and display the loan-to-value ratio based on the provided information.
- Users can understand the impact of changes in loan amount or property value on the loan-to-value ratio.
Functional Requirements:
Input:
The system shall allow users to enter the following details:
- Loan Amount (in INR)
- Property Value (in INR)
Calculation:
- The system shall calculate the loan-to-value ratio based on the provided loan amount and property value.
Output:
- The system shall display the calculated loan-to-value ratio to the user.
External Interface Requirements
User Interfaces:
- The user interface shall consist of input fields for loan amount and property value, along with a “Calculate” button.
- The calculated loan-to-value ratio shall be displayed prominently.
Hardware Interfaces:
- The system should be compatible with standard computing hardware.
Software Interfaces:
- The application will be developed using HTML, CSS, and JavaScript for the frontend.
- The backend can be implemented using a server-side framework (e.g., Node.js, Django) with a database for data storage.
Communication Interfaces:
- The application will communicate with the server for LTV ratio calculations.
Performance Requirements
Response Time:
The system should provide a response time of under 3 seconds for a typical user input.
Throughput:
The application should handle at least 50 simultaneous users.
System Constraints
Regulatory Requirements:
The application should adhere to relevant financial regulations.
Hardware Limitations:
The system should be compatible with devices supporting standard web browsers.
Security Requirements
Authentication:
User authentication may be implemented to ensure data security.
Data Protection:
User data, if stored, should be securely protected.
Quality Attributes
Reliability:
The application should provide accurate loan-to-value ratio calculations based on the entered loan and property details.
Maintainability:
The code should be well-documented for ease of maintenance.
Usability:
The user interface should be intuitive, requiring minimal guidance.
Testing Requirements
Test Cases:
Test cases should cover various scenarios with different loan amounts and property values to ensure accurate loan-to-value ratio calculations.
Test Case 1:
- Inputs: Loan Amount = 1,00,000 INR, Property Value = 1,20,000 INR.
- Expected Output: Loan-to-Value Ratio ≈ 83.33%
Test Case 2:
- Inputs: Loan Amount = 5,00,000 INR, Property Value = 8,00,000 INR.
- Expected Output: Loan-to-Value Ratio ≈ 62.5%
Test Case 3:
- Inputs: Loan Amount = 2,00,000 INR, Property Value = 1,50,000 INR.
- Expected Output: Loan-to-Value Ratio ≈ 133.33%
Acceptance Criteria:
The application is considered successful if it produces correct loan-to-value ratios based on the provided loan and property details.
Project Timeline
Milestones:
Design, Development, Testing, Deployment.
Development Phases:
Frontend development, Backend development, Testing, Deployment.
Glossary
None
Database Structure
Tables:
LTV_Calculator_Records:
- RecordID (Primary Key, Auto-increment)
- LoanAmount (Decimal)
- PropertyValue (Decimal)
- LoanToValueRatio (Decimal)
- CalculationDate (DateTime)
Conclusion
This SRS document outlines the requirements for the LTV (Loan-to-Value) Calculator. It serves as a guide for the development team and ensures that the application meets the specified criteria. Review and approval by relevant stakeholders are essential before proceeding with the development phase.