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Car Rental Management System: Code Review and Analysis Report

$1.$ Executive Summary

This Report develops a detailed analysis of the Car Rental Management System that was created in Python for a small car rental business. The system is intended to take commands related to vehicle rentals, returns and customer details through the command line system. The investigation of the system reveals that despite the obvious success of the system in providing baseline functionality for the organizational needs, there exist opportunities that can significantly optimize the presence of the robustness, efficiency, and maintainability of the system.

$2.$ Introduction

The Car Rental Management System aims at helping a small car rental business carry out its day to day operations. It offers the ability to present a list of available cars, rental and return of vehicles, viewing a history of rentals, and the customers$$ records. Three text files are involved in the system including cars$\_$inventory. txt$,$ rentals. txt and returns. txt used for storing and retrieving information.

$3.$ Code Structure and Design

$1$ Architecture of the system The whole system is contained in one Python class called CarRentalSystem. This class is composed of all or any function related to functionality and data manipulation. The main$\_$menu$()$ method is the working interface where a user can interact with the system using the command line menu.

$3\mathrm{.}2$ Key Components

$$ Constructor $($init$)$: Initializes file paths for data storage.

$$ display$\_$available$\_$cars$()$: Shows list of available cars for rent.

$$ rent$\_$a$\_$car$()$: Handles the car rental process.

$$ return$\_$a$\_$car$()$: Processes car returns and calculates fees.

$$ display$\_$rental$\_$history$()$: Shows all past rentals.

$$ display$\_$customer$\_$information$()$: Retrieves rental history for a specific customer.

$3\mathrm{.}3$ Data Management The system uses text files for data persistence:

$$ cars$\_$inventory.txt: Stores car details and availability status.

$$ rentals.txt: Records ongoing rental transactions.

$$ returns.txt: Logs completed rentals and associated fees.

$4.$ Functionality Assessment

$4\mathrm{.}1$ Display Available Cars Implementation: The method reads cars$\_$inventory, that has already been defined in the text above. txt file and shows all the cars that are labeled $$available$.$ Effectiveness: Filters and provides to the user only available cars. Potential Improvement: The Big Show: It may also be useful to add some kind of sorting $($for instance by price or model$).$

Create a flowchart for the 'Display Available Cars' functionality of a car rental management system. The flowchart should include the following steps:

$1.$ Start

$2.$ Open 'cars$\_$inventory.txt$\text{'}$ file

$3.$ Read all lines from the file

$4.$ For each line, split into car details

$5.$ If car status is 'available', print car details

$6.$ End For

$7.$ Display 'Available Cars:$\text{'}$ header

$8.$ End

$4\mathrm{.}2$ Rent a Car Implementation: Enables a user to choose a car, capture their rental information and change a car$$s status. Effectiveness: Subprocess: Effectively receives and handles rental applications as well as updating the rentals files. Potential Improvement: It is important to continue a policy of reserve for the following days $$ weeks $$ months.

Create a flowchart for the 'Rent a Car' functionality of a car rental management system. The flowchart should include the following steps:

$1.$ Start

$2.$ Input customer name

$3.$ Input rental duration

$4.$ Input car preference $($make and model$)$

$5.$ Open 'cars$\_$inventory.txt$\text{'}$ file

$6.$ Read all lines from the file

$7.$ For each line, split into car details

$8.$ If car matches preference and status is 'available', update status to 'rented'

$9.$ Generate rental ID

$10.$ Write rental information to 'rentals.txt$\text{'}$

$11.$ Update 'cars$\_$inventory.txt$\text{'}$

$12.$ Print 'Car rented successfully!$\text{'}$

$13.$ End

$4\mathrm{.}3$ Return a Car Implementation: Registers entries of cars as they are returned, determines amounts for rent charges and record the changes in car status. Effectiveness: Balances returns and fees transaction processes in that it does not make errors in calculation of the fee element in a transaction. Potential Improvement: Include the features such as late return penalties and the reporting of any vehicle damages.

$1.$ Start

$2.$ Input rental ID

$3.$ Open 'rentals.txt$\text{'}$ file

$4.$ Read all lines from the file

$5.$ For each line, split into rental details

$6.$ If rental ID matches, retrieve car details

$7.$ Calculate total fee

$8.$ Open 'returns.txt$\text{'}$ file

$9.$ Write return information to 'returns.txt$\text{'}$

$10.$ Open 'cars$\_$inventory.txt$\text{'}$ file

$11.$ Update car status to 'available'

$12.$ Print 'Car returned successfully!$\text{'}$

$13.$End$"$

$4\mathrm{.}4$ Display Rental History Implementation: It reads and displays all the entries in the rentals. txt file. Effectiveness: Gives an overall vision of all rentals as a single object. Potential Improvement: Implement the get Page function for handling of large data sets as well as paging, filtering an