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Parking Lot

System Requirements:

  1. Parking lot has multiple floors, where customer can park their cars.
  2. Each parking floor will have many parking spots. The system should support multiple types of parking spots such as Compact, Large, Handicapped, Motorcycle, etc.
  3. There are different entry and exits.
  4. Customer has to get the parking ticket at the entry.
  5. Customer can pay the parking fee at an attender or during an exit.
  6. Customer can pay with cash (making it easy for implementation).
  7. Customer can pay at the parking info-portal, that is present in different floors of the complex.
  8. Parking can be done only when the slot is Available.
  9. Entrance board should show how many parking sports are currently available.
  10. Each parking floor should have a display board showing any free parking spot for each spot type.
  11. The system should support a per-hour parking fee model. For example, customers have to pay $4 for the first hour, $3.5 for the second and third hours, and $2.5 for all the remaining hours.

Not in scope:

  • No special parking for electric cars.

Entities:

Entity Description
Admin Responsible for adding or updating reservations
Customer Customer gets the parking ticket and pay for it
Parking Attender Performs activities on behalf of customer
System Display the available parking slots per type

Use Cases:

  • System has all the available slots
  • Customer comes and parks his vehicle:
    • Customer takes a ticket from that floors info-portal or from parking assistance.
    • When parked there should be one slot reduced at that floor, as well as the whole system.
    • Parking ticket will have the vehicle and floor information.
  • Customer planning to the parking:
    1. Pay the parking fee.
      • Fee can be paid at info-portal
      • Fee can be paid to parking assistance
      • Fee can be paid at the exit (in step 2)
    2. Takes the car to exit, and provide the parking ticket
      • If fee is not paid, then pay the fee.
      • Increase the available parking slot at the floor where customer had parked the car.

Objects:

Object Definition
ParkingLot This will have list of Parking Floors, name and address, and total available slots per type.
ParkingFloor This will have list of Parking Slots, and the available slots per type.
ParkingSpot type, available/parked
Account This will be a user with name, it can be eiter admin, or parking attender
ParkingAttender Inherited from account, also has functionality to createTicket/payTicket
Admin Inherited from account, also has functionality to addParkingSlots, ParkingFloor and Exits
Vehicle Each vehicle will have make, model, year, number and type
ParkingTicket This class will encapsulate a parking ticket. Customers will take a ticket when they enter the parking lot.
ParkingDisplayBoard THis system will take care of displaying the available slots per type.
EntryPanel / ExitPanel This will have a functionality to generate a ticket or pay for ticket
Payment THis will be responsible for the payments
ParkingRate This will be a constant with rates for each type and hours.
ParkingInfoPortal This will have similar functionality as Parking Attender, but will be used by Customer
ParkingAttenderPortal This portal will be used by ParkingAttender to perform his actions.
ParkingSystem This the main system that Runs the software.

High Level Design