44

Software Requirements Specification (SRS) for SIP Calculator

Introduction

Purpose:

The purpose of this document is to outline the requirements for the development of a Systematic Investment Plan (SIP) Calculator application.

Scope:

The SIP Calculator will allow users to estimate future wealth accumulation based on input parameters such as monthly investment amount, expected annual return, and investment tenure.

Definitions, Acronyms, and Abbreviations:

SIP: Systematic Investment Plan

System Overview

System Description:

The SIP Calculator will be a web-based application accessible through a browser. Users will input investment details, and the system will calculate the future value of their investments.

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 SIP:

  • Users can input the monthly investment amount, expected annual return, and investment tenure.
  • The system will calculate and display the future value of the investment.

Functional Requirements:

Input:

The system shall accept the following input:

  • Monthly Investment Amount (in INR)
  • Expected Annual Return (in percentage)
  • Investment Tenure (in months or years)

Calculation:

The system shall calculate the future value of the investment using the SIP formula:

  • ��=�×(1+�)�−1�
  • FV=P×
  • r
  • (1+r)
  • n
  • −1
  • ​
  • where:
    • �
    • P is the Monthly Investment Amount
    • �
    • r is the monthly interest rate (expected annual return divided by 12 and multiplied by 0.01 to convert percentage to decimal)
    • �
    • n is the total number of investments (monthly investments multiplied by the investment tenure in months)

Output:

  • The system shall display the calculated future value 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 monthly investment amount, expected annual return, and investment tenure, along with a “Calculate” button.
  • The calculated future value 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.

Test Case 1:

  • Inputs: Monthly Investment Amount = 5,000 INR, Expected Annual Return = 10%, Investment Tenure = 60 months.
  • Expected Output: Future Value ≈ 3,63,759.04 INR

Test Case 2:

  • Inputs: Monthly Investment Amount = 10,000 INR, Expected Annual Return = 8%, Investment Tenure = 36 months.
  • Expected Output: Future Value ≈ 4,08,368.09 INR

Test Case 3:

  • Inputs: Monthly Investment Amount = 15,000 INR, Expected Annual Return = 12%, Investment Tenure = 48 months.
  • Expected Output: Future Value ≈ 12,15,661.80 INR

Acceptance Criteria:

The application is considered successful if it produces correct future values based on the standard SIP calculation formula.

Project Timeline

Milestones:

Design, Development, Testing, Deployment.

Development Phases:

Frontend development, Backend development, Testing, Deployment.

Glossary

SIP: Systematic Investment Plan

Database Structure

Tables:

SIP_Calculations:

  • CalculationID (Primary Key, Auto-increment)
  • MonthlyInvestmentAmount (Decimal)
  • ExpectedAnnualReturn (Decimal)
  • InvestmentTenure (Integer)
  • FutureValue (Decimal)
  • CalculationDate (DateTime)

Conclusion

This extended SRS document provides a more detailed overview of the SIP Calculator application, including the database structure and additional test cases. It should be reviewed and approved by relevant stakeholders before proceeding with the development phase.

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