Prepare a Software Requirement Specification (SRS) document for a banking system. The transactions you must take into consideration are Deposit, Withdrawal and Balance.

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A Software Requirement Specification (SRS) is a detailed document that outlines the functional and non-functional requirements of a software system. It acts as a blueprint for developers, testers, and stakeholders, ensuring that all aspects of the system are well-defined before development begins.

1. Introduction

1.1 Purpose

The purpose of this document is to outline the requirements for a banking system that supports basic banking transactions such as Deposit, Withdrawal, and Balance Inquiry. This document will serve as a guide for developers, testers, and stakeholders to ensure that the system meets the necessary functional and non-functional requirements.

1.2 Scope

The banking system will be a software application that allows customers to perform the following transactions:

  • Deposit: Adding funds to an account.
  • Withdrawal: Removing funds from an account.
  • Balance Inquiry: Checking the current balance of an account.

The system will be designed for use by bank customers and bank employees. It will be accessible via a user-friendly interface, ensuring ease of use and security.

1.3 Definitions, Acronyms, and Abbreviations

  • SRS: Software Requirements Specification
  • UI: User Interface
  • API: Application Programming Interface
  • DB: Database
  • ATM: Automated Teller Machine

1.4 References

  • IEEE 830-1998: IEEE Recommended Practice for Software Requirements Specifications.
  • ISO/IEC 25010: Systems and software engineering — Systems and software Quality Requirements and Evaluation (SQuaRE).

1.5 Overview

The rest of this document is organized as follows:

  • Section 2 describes the overall description of the system.
  • Section 3 outlines specific system requirements.

2. Overall Description

2.1 Product Perspective

The banking system is a standalone application that interacts with a central database to manage customer accounts and transactions. It will be accessible via a web-based interface and may also support integration with ATM machines.

2.2 Product Functions

The primary functions of the banking system include:

  1. Deposit: Allow customers to deposit funds into their accounts.
  2. Withdrawal: Allow customers to withdraw funds from their accounts.
  3. Balance Inquiry: Allow customers to check their account balance.

2.3 User Characteristics

The system will be used by two main types of users:

  1. Customers: Individuals who hold accounts with the bank and wish to perform transactions.
  2. Bank Employees: Staff members who may assist customers and manage accounts.

2.4 Constraints

  • The system must comply with all relevant banking regulations and security standards.
  • The system must be available 24/7 with minimal downtime.
  • The system must support a large number of concurrent users.

2.5 Assumptions and Dependencies

  • The system assumes that users have basic knowledge of banking transactions.
  • The system depends on a reliable database for storing account information.
  • The system assumes that the network infrastructure is secure and reliable.

3. Specific Requirements

3.1 Functional Requirements

3.1.1 Deposit

  • FR-1: The system shall allow customers to deposit funds into their accounts.
  • FR-2: The system shall validate the deposit amount to ensure it is a positive number.
  • FR-3: The system shall update the account balance immediately after a successful deposit.
  • FR-4: The system shall generate a transaction receipt for the deposit.

3.1.2 Withdrawal

  • FR-5: The system shall allow customers to withdraw funds from their accounts.
  • FR-6: The system shall validate the withdrawal amount to ensure it does not exceed the available balance.
  • FR-7: The system shall update the account balance immediately after a successful withdrawal.
  • FR-8: The system shall generate a transaction receipt for the withdrawal.

3.1.3 Balance Inquiry

  • FR-9: The system shall allow customers to check their account balance.
  • FR-10: The system shall display the current balance without making any changes to the account.

3.2 Non-Functional Requirements

3.2.1 Performance

  • NFR-1: The system shall handle up to 10,000 concurrent users without degradation in performance.
  • NFR-2: The system shall process transactions within 2 seconds under normal load.

3.2.2 Security

  • NFR-3: The system shall encrypt all sensitive data, including account numbers and passwords.
  • NFR-4: The system shall require two-factor authentication for all transactions.

3.2.3 Usability

  • NFR-5: The system shall have a user-friendly interface that requires minimal training.
  • NFR-6: The system shall provide clear and concise error messages.

3.2.4 Availability

  • NFR-7: The system shall have an uptime of 99.9%.
  • NFR-8: The system shall have a disaster recovery plan in place to ensure data integrity.

3.3 System Attributes

3.3.1 Reliability

  • SA-1: The system shall have a mean time between failures (MTBF) of at least 1,000 hours.
  • SA-2: The system shall have a mean time to repair (MTTR) of no more than 1 hour.

3.3.2 Maintainability

  • SA-3: The system shall be modular, allowing for easy updates and maintenance.
  • SA-4: The system shall include comprehensive logging for troubleshooting and auditing purposes.

3.3.3 Portability

  • SA-5: The system shall be compatible with multiple operating systems, including Windows, macOS, and Linux.
  • SA-6: The system shall support multiple web browsers, including Chrome, Firefox, and Safari.

3.4 Interface Requirements

3.4.1 User Interfaces

  • UI-1: The system shall provide a login screen for user authentication.
  • UI-2: The system shall provide a dashboard for customers to select transactions (Deposit, Withdrawal, Balance Inquiry).
  • UI-3: The system shall display transaction receipts in a printable format.

3.4.2 Hardware Interfaces

  • HI-1: The system shall support integration with ATM machines for cash deposits and withdrawals.
  • HI-2: The system shall support barcode scanners for check deposits.

3.4.3 Software Interfaces

  • SI-1: The system shall integrate with the bank’s existing database for account management.
  • SI-2: The system shall provide APIs for third-party integrations, such as mobile banking apps.

3.4.4 Communication Interfaces

  • CI-1: The system shall support secure communication protocols (e.g., HTTPS) for all data transmissions.
  • CI-2: The system shall support SMS notifications for transaction alerts.

4. Appendices

4.1 Appendix A: Glossary

  • Account Balance: The amount of money currently in a customer’s account.
  • Transaction: Any action that changes the account balance, such as a deposit or withdrawal.

4.2 Appendix B: Analysis Models

  • Use Case Diagrams: Illustrate the interactions between users and the system for each transaction type.
  • Sequence Diagrams: Show the flow of operations for deposit, withdrawal, and balance inquiry.

4.3 Appendix C: To Be Determined List

  • TBD-1: The exact format of the transaction receipt.
  • TBD-2: The specific encryption algorithms to be used for data security.

This SRS document provides a comprehensive overview of the requirements for the banking system. It will be used as a reference throughout the development process to ensure that the final product meets the needs of both customers and bank employees.

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