BSSE (Evening) Semester 6th
Subject: Software Construction
Project: Point of Sale Machine
Submitted by: Aadil Safi (11729)
: Faizan Khan (11726)
: Hassan Zeb (11551)
: Muhammad Hamza Aziz (11723)
: Moeez Haider (11721)
Submitted To: Ms. Shumaila
National University of Modern Languages
Usecase Diagram for Point of Sale Machine
cash
Scanning item Calculate Price Including Taxes
<<include>> <<include>> Credit/Debit Card
Payment
<<include>>
Checkout
<<include>>
Customer
return items
Print Receipt Cashier
cancel transaction Login
<<include>>
<<include>>
Update Inventory <<include>> Inventory Report
<<include>>
Admin
Manage Users Generate Sales Report
Manager
Reorder Inventory
Update Inventory
Update
Inventory
Customer
Admin
Admin has access to update inventory, and if customer returns an item it also updates the
inventory as the item is added back to the inventory .
Use Case ID UC-1
Use Case name Update Inventory
Actors Admin, Customer
Purpose Customer and admin can update the selected items
Overview This use case describe how the customer and admin can update inventory
Type Primary
Pre-Condition Inventory selected
Post-Condition Inventory updated
Actors Action System Response
1. Admin will enter the username 2. System Will show box to enter Password
3. User Enters the password 4. System Will let you login to the system.
5. Admin adds the item that has been order 6. System Will Show a message item added
and wasn’t previously on the system. successfully.
Alternative Flow
1. Admin will enter the wrong username 2. System Will show username not found
3. Admin Enters the wrong password 4. System Will not let you login to the
system.
Checkout Items
Checkout Items Calculate Price
Including Tax
Scanning Items
Customer
Cashier
Customer
Pick an item and went to the cashier counter. Cashier checkout the item and scan it to calculate
the price of the item.
Use Case ID UC-2
Use Case name Checkout
Actors Customer ,Cashier
Purpose After customer completes its action they need to checkout
Overview This use case describe how the customer and other actors finally checkout.
Type Primary
Pre-Condition Calculating the Prices
Post-Condition Done the Payment Checkout
Actors Action System Response
1. Customer Brings the item to cashier, 2. System shows the items being added to
cashier scans the items the list.
3. The required amount is present on the 4. System will show Transaction completed
customers card successfully.
Alternative Flow
Actors Action System Response
1. Customer Brings the item to cashier, 2. System shows the items being added to
cashier scans the items the list.
3. The required amount is not present on the 4. System will show Transaction failed.
customers card
Manage User/ Login
Manage User
Admin
Admin manage the account of cashiers and manager, no other has access to the management of
accounts. Only person can login into the system who has account in system, no other person can
access to the system.
Use Case ID UC-3
Use Case name Manage users
Actors Admin
Purpose Managing the acting users
Overview This use case describe how the admin can limit and manage users.
Type Primary
Pre-Condition Selected Users
Post-Condition Managed Users
Actors Action System Response
1. Admin Select Username 2. System Will show box to enter Password
3. Admin Enters the password 4. System Will let you login to the system.
5. Admin deletes/add users 6. System will add/delete the specific user.
Alternative Flow
1. Admin Select Username 2. System Will show box to enter Password
3. Admin Enters the wrong password 4. System Will not let you login to the
system.
Cancel Transaction
Cancel
Transaction
Customer
If a customer cancel a transaction, the inventory will be updated and new inventory report show
on the system.
Use Case ID UC-4
Use Case name Cancel Transaction
Actors Customer
Purpose Customers wants to cancel the transaction
Overview This use case describe how the relevant actor (customer) can cancel
transaction.
Type Primary
Pre-Condition Transaction is processed.
Post-Condition Transaction Cancelled
Actors Action System Response
1. The customer changes his mind about a 2. System will show the items being added
specific product he cancels the to the inventory and the transaction was
transaction. not made.
Alternative Flow
1. Customer doesn’t change his mind and 2. System will show a message transaction
makes the transaction. completed amount deducted.
Payment
Payment
cash
Customer Credit/debit card
Cashier
Customer can make payment for an item through Credit/debit card or cash.
Use Case ID UC-5
Use Case name Payment
Actors Cashier, Customer
Purpose Pay the Bill
Overview This use case describe how customer will pay the bill.
Type Primary
Pre-Condition Payment Processing
Post-Condition Payment successful.
Actors Action System Response
1. Customer swipes his card 2. System Deducts the amount
3. Customer gets a receipt of the payment 4. System Generates a Receipt of payment
one for the customer and other for the
company.
Alternative Flow
1. Customer swipes his card 2. System starts processing and takes too
long.
3. Customer Tries Again 4. System Shows an error.
Print Receipt
Print Receipt
Cashier
Printed receipt of the list of the items bought by a customer is generated through the system by a
cashier.
Use Case ID UC-6
Use Case name Print Receipt
Actors Cashier
Purpose Give proper receipt to the Customer
Overview This use case describe how the system allows the cashier to give receipt to
customer
Type Primary
Pre-Condition Receipt is processing
Post-Condition Receipt to handed over to customer
Actors Action System Response
1. Cashier will scan the products 2. System Will add all the products together
on list.
3. Cashier will click generate the receipt. 4. System Will generates a receipt for the
items listed.
Alternative Flow
1. Cashier will scan the products but some 2. System Will show an error that the
products barcode not present barcode doesn’t match any item.
Generate Sales Report
Generate Sales
Report
Manager
Manager has access to generate daily sales report of inventory to make sure that the inventory is
updated on daily basis.
Use Case ID UC-7
Use Case name Generate sale report
Actors Manager
Purpose To calculate and kept record of sold items
Overview This use case describe how system kept record of sale item to manager
Type Primary
Pre-Condition Record processing
Post-Condition Record kept
Actors Action System Response
1. Manager will login 2. System Will show logged in message.
3. Manager clicks the show record button 4. System Will show him all the records.
Alternative Flow
1. Manager will login 2. System Will show logged in message.
3. Manager clicks the show record button 4. System Crashes.
Return Item
return item
<<include>>
Customer
payment
Cashier
Customer brings the item along with the original receipt to returns the item cashier returns the items and
pay him back.
Use Case ID UC-8
Use Case name Return Item
Actors Customer, Cashier
Purpose Customer wants to return any item
Overview This use case describe how the customer will return an item.
Type Primary
Pre-Condition Customer should bring the item and receipt.
Post-Condition Item returns successfully
Actors Action System Response
1. Customer will brings the item the cashier 2. System will add back the items to
will scan the tags inventory.
Login
Login
Cashier Manager
The Cashier and Manager must have Accounts in the system so they can login and continue their work.
Use Case ID UC-9
Use Case name Login
Actors Manager, cashier
Purpose Login to the system
Overview This use case describe how the system allows the actors to login in
authorized system
Type Primary
Pre-Condition System processing
Post-Condition Actors successfully login
Actors Action System Response
1. User Select Username 2. System Will show box to enter Password
3. User Enters the password 4. System Will let you login to the system.
Alternative Flow
1. User Select Username 2. System Will show box to enter Password
3. User Enters the wrong password 4. System Will not let you login to the
system.
State Diagram for Point of Sale Machine
Activity Diagram for Point of Sale
