Software Requirements Specification (SRS) for EMI Calculator
Rashmi Sukhdev
Software Requirements Specification (SRS) for EMI Calculator
Introduction
Purpose:
The purpose of this document is to outline the requirements for the development of an EMI (Equated Monthly Installment) Calculator application.
Scope:
The EMI Calculator will allow users to calculate monthly installment amounts for loans based on input parameters such as loan amount, interest rate, and loan tenure.
Definitions, Acronyms, and Abbreviations:
EMI: Equated Monthly Installment
System Overview
System Description:
The EMI Calculator will be a web-based application accessible through a browser. Users will input loan details, and the system will calculate the monthly installment.
System Architecture:
The application will have a client-server architecture, with the client being the web browser and the server handling the calculation logic.
Functional Requirements
Use Cases:
Calculate EMI:
Users can input the loan amount, interest rate, and loan tenure.
The system will calculate and display the Equated Monthly Installment.
Functional Requirements:
Input:
The system shall accept the following input:
Annual Interest Rate (in percentage)
Loan Tenure (in months)
Loan Amount (in INR)
Calculation:
The system shall calculate the EMI using the following formula:
���=�×�×(1+�)�(1+�)�−1
EMI=
(1+r)
n
−1
P×r×(1+r)
n
where:
�
P is the Loan Amount
�
r is the monthly interest rate (annual rate divided by 12 and multiplied by 0.01 to convert percentage to decimal)
�
n is the Loan Tenure in months
Output:
The system shall display the calculated EMI to the user.
Non-Functional Requirements:
The system should provide a response time of under 2 seconds.
The application should be accessible on common web browsers (Chrome, Firefox, Safari).
External Interface Requirements
User Interfaces:
The user interface shall include input fields for loan amount, interest rate, and loan tenure, along with a “Calculate” button.
The calculated EMI shall be displayed prominently.
Hardware Interfaces:
The system should be compatible with standard computing hardware.
Software Interfaces:
The application shall be developed using HTML, CSS, and JavaScript.
The server-side logic can be implemented using a backend framework (e.g., Node.js, Django).
Communication Interfaces:
The application will communicate with the server for the calculation and display of results.
Performance Requirements
Response Time:
The system should respond within 2 seconds for a typical user input.
Throughput:
The application should handle at least 100 simultaneous users.
System Constraints
Regulatory Requirements:
The application should comply with relevant financial regulations.
Hardware Limitations:
The system should be compatible with devices with standard web-browsing capabilities.
Security Requirements
Authentication:
The application may not require user authentication as it’s a public tool.
Data Protection:
The system should not store or retain any user input data after the calculation.
Quality Attributes
Reliability:
The application should produce accurate results based on the provided input.
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 input scenarios to ensure accurate calculations.
Acceptance Criteria:
The application is considered successful if it produces correct EMIs based on standard EMI calculation formula.
This SRS document provides a foundation for the development of an EMI Calculator, outlining key requirements and expectations. It should be reviewed and approved by relevant stakeholders before proceeding with the development phase.
