UML Assignment – Semester 2, 2024

BISM7255

A digital solution for VendWise Solutions Vending Machines

Introduction 

Summary Task:

The assignment asks you to create a collection of UML diagrams (eight diagrams) that visually represent an application to develop a commercial software solution.

The work completed in this first assignment will form the foundation for the third assignment, where you build the application.

You will act as a business analyst for Smart Strategy Consultants and start to elicit and formulate business requirements to help develop an innovative and novel concept for VendWise Solutions, a vending machine manufacturer.

Assignment requirements:

1.  You must use Enterprise Architect software from Sparx Systems to create the UML diagrams.

2.  You must, in total, create eight UML diagrams – five diagrams that follow the case description and three diagrams that present a feature or innovation that is not  described   in  the  case  description   (we   refer  to  them  as  “innovation diagrams”). For more details, see section ‘Task Description’ .

3.  You  must use UML 2.5 – This means the assignment must comply with the tutorial materials and, by extension, the OMG UML specification version 2.5 of Sparx Systems’ UML recommendations.

4.  You will submit two documents:

a.  A Word document where all UML diagrams are presented

b.  For the Innovation Diagrams a short brief (no more than 100 words per diagram) is required explaining the purpose or intent of the innovation(s). This is to assist the markers to understand your intended purpose of the diagrams.

c.  You must also submit a SINGLE Enterprise Architect file that includes the eight UML 2.5 diagrams, which the marker uses if the copied UML diagrams are not readable, or the marker wants to verify something.

Students per Assignment

The assignment can  be submitted as an  individual  assignment OR done  by two students as a group assignment. When doing it as a group assignment, it is a UQ requirement to do a peer evaluation. For more details, refer to the Blackboard site.

How do I submit the assignment?

The assignment submission must be made via the Blackboard site following the steps below:

1.  Go to “Assessment” > “Assessment 1: UML Assignment”

2.  Find the links

a.  There will be two links - one for Blackboard, and another for TurnItIn

3.  Upload both your project report file and your Enterprise Architect file (*.eapx) to BOTH links

a.  If you have worked as a group (max two people) you will also submit your peer assessment form. (.pdf) to Blackboard

How do I know that my assignment submission was successful?

When the assignment is successfully submitted, the student receives two automatically generated confirmation emails (one for the Turnitin submission, one for the  EA project submission) in their student email. Each email contains a unique submission ID.

Important submission information:

1.  To avoid any potential technical problems with computers or the internet, students are advised to commence assignment submission at least 3 hours before they are due.

2.  Students must click on the Submit button to submit their assignments. Do not save the project as a draft; you must submit the assignment by clicking the submit button. The submission has not been finalised when the assignment is only saved.

3.  If the student does not receive any of the two confirmation emails with the submission IDs, then the student must assume that the submission of the entire assignment or part of it was unsuccessful.

4.  If a student does not receive the TWO confirmation emails with the submission IDs  within  60  minutes,  the  student  is  advised  to  resubmit  the  individual assignment part of the entire assignment (word file and EA file).

5.  The two confirmation emails with the submission IDs are the only proof that the assignment has been successfully submitted. Do not delete these confirmation emails.

6.  It is the student’s responsibility to ensure that any UQ assignment is submitted successfully.

Any unsuccessful submission may result in a late penalty.

Misconduct

Understandably, students talk with each other regularly and discuss problems and potential solutions. However, it is expected that the submitted assignment is a unique work. All parts of the assignment are to be completed solely by the student(s) indicated on the first page of the assignment. The best practice to avoid misconduct is not to look at another student’s file(s) and not to show your solution to other students. If an assignment  is  perceived  not  to  be  a  unique  work,  a  loss  of  marks  and  other implications can result.

For  further  information  about  academic  integrity,  plagiarism  and  consequences, please      visit        http://ppl.app.uq.edu.au/content/3.60.04-      student-integrity-and- misconduct\

DETAILED INFORMATION ABOUT THE PROPOSED DESIGN

In the following, you find details that allow you to create a representation of the business case. You must capture the Vending Machine application’s operation as described here. You cannot fill in gaps or leave information out. If you do so, marks will be deducted.

User Login and Ordering (shopping cart) application:

Smart   Strategy   Consultants   have   been   engaged   by   VendWise   Solutions,   a manufacturer of Internet enabled Vending Machines. The machines will allow the customer to interact with the machine via an application on the customers phone.

It is proposed that the team create an application. Our Minimal Viable Product (MVP) will include:

•    User Registration and Login

•   Vending Machine selection

•   Order Entry and (simulated) Payment

•    Electronic Receipt generation

DETAILED INFORMATION ABOUT THE PROPOSED DESIGN

The following text provides the details to create the Use Case Diagram. The Use Case will present the User Registration and Login, plus the Order Entry and Payment.

The goal of the digital solution is to specify the processes involved and the Actors who participate in the processes. The User will complete an online application to Register their details. Once the Users details have been confirmed they will be considered a Customer and be able to Login to the online system to place an Order. The Customer choses a vending machine and selects products to add to their shopping cart before completing the Order and making payment. The Vending machine then dispenses the items and sends a Receipt to the Customers account.

Ordering and Payment Process

The following provides details to create the Activity Diagram and Sequence Diagram. Both diagrams present the Ordering and Payment process for the Customer. However, the Activity Diagram needs to capture the process, whereas the Sequence Diagram captures  the  interactions  between  the  Actors  (Customer,  Vending  Machine  and Payment Gateway).

The shopping process starts when a User opts to “Register Now”

First, the User logs into the application with their Username and Password. If the User is not a registered Customer, they will need to sign up for a new account. To do so, the user enters personal information including:

•   Given Name

•    Family Name

•    Email address (doubles as the Username, must be unique across the system)

•   Contact Number

•    Password (minimum  10 characters with Upper, Lower, Number and Special characters)

After submitting the details, a Two Factor Identification system will confirm the Email and  Contact  number.  Once  the  details  have  been  confirmed  the   User  will   be considered a Customer. The User then logs into the system with their Email address (as a Username) and password.

Once the Customer is logged in, they select a VendWise vending machine and virtual display of the available products is presented. Tapping on a product displays the details (short description and price) with an option to Add to Cart. When the Customer has added all they want to the Shopping Cart they can see the Cart to make a final check. At the same time the machine is checked to ensure the items are still available - a purchase may have occurred while the order was in progress. If there are any items unavailable, their quantity is reduced to zero. The Customer can Purchase or Cancel the order which will involve:

•    Purchase: The Total Amount and Order Number Reference is sent to a Payment Gateway (for example Stripe or PayPal) where the user can enter credit card details.  NOTE:  No  Credit  Card  details  are  to   be  kept   in  the  VendWise application. The Payment Gateway responds to the application with a Payment status of Complete or Cancelled and a  Receipt  Number  (if Cancelled, the Receipt Number is 000000 and can be ignored). Processing these will involve:

o Payment Complete: The Cart is copied to become an Order and the Receipt Number recorded. An electronic receipt is sent to the Customers account. At the same time the VendWise vending machine is instructed to dispense the selected items.

o Payment Cancelled: The Customer is informed the payment has been declined.

•   Cancel: Nothing

In all cases the Cart is emptied. The Customer can restart the process by selecting a VendWise vending Machine.

Data Requirements of the application

The following provides details needed for the Domain Class Diagram. The diagram shall present the data structure for the VendWise application.

VendWise will have many vending machines in operation, each with their own unique digital identification, Date of manufacture, GPS coordinates and a human readable description of its location (for example “Chamberlain Building 35, Level 1”). Also, a short description of the contents from an Enumerated list. The initial list of contents is:

•   0000 0001: Cold Drinks

•   0000 0010: Cold Snack Food

•   0000 0100: Hot Drinks

•   0000 1000: Hot Food

•   0001 0000: Stationary Supplies

•   0010 0000: Electronic Equipment (eg Phone chargers and cables)

This will allow the one machine to be registered with a combination of contents. For example, 0010 0011 represents a machine with a combination of Cold Food, Cold Drinks and Electronic Equipment.

The current status of the vending machine will be sorted in another Enumerated List. These are the States as noted in the Lifecycle of the VendWise vending machine.

Lastly the machine will have an array of Slots each with a unique number for the machine. The Slot has an internal location – Row 1 being the top row through to Row 6 at the bottom, and a Column from 1 to 12.

The Items for sale have a Manufacturer, Description, Purchase Price, Recommended Retail Price, and Image.

Between the Slots and Items there is a Configuration which notes which Slots have which Items and their current quantity, current sale price and date for when it was stocked.  Note: some slots can  be combined for items that require two (or more) columns to dispense. For example chips require 2 columns on a row where chocolate bars only require 1. This configuration is setup by the person restocking the machine.

Besides  the  previously  mentioned  details  for  the  Customer  (see  Ordering  and Payment Processing), when a Customer makes a purchase, the Items purchase price is noted on the Order along with details of the vending machine, and date of purchase. As this is a new venture, tracking of the performance of different VendWise vending machines will be monitor as the company test out different locations, Configurations and Items being dispensed from the vending machines. As such an Order needs to capture all the details about the purchase at the point in time it was made. It cannot be assumed that the same  machine  is  dispensing the same  Items,  in  the  same Configuration, or is in the same Location with subsequent purchases.

Lifecycle of the VendWise vending machine

The following provides details to create the State Machine Diagram. The diagram will represent the different states of the vending machine throughout its operation.

The VendWise vending machine starts in an Off state. After the machine is powered on it performs a startup action and enters a Self Test state. If the test fails the vending machine goes into an Out of Service state, otherwise there is a triggerless transition to the Idle state. In this state the vending machine waits for a Customer Order.

The  vending  machine  state  changes  from   Idle  to  Serving  Customer  when  the Customer Order is received. Note the transition from Idle to Serving Customer can be triggered by cancel event as the customer could cancel the transaction at any time.

The Serving Customer state is a composite state with sequential substates:

•   Verifying Order

•    Dispensing Items

The Serving Customer state has a triggerless transition back to Idle state after the transaction is complete. If during the Serving Customer state encounters an error, a Service Failed trigger will set the vending machine into an Out of Service state.

When the vending machine is in an Out of Service state, it will signal VendWise of the issue (not part of the State Diagram) and VendWise will respond with a PowerDown trigger to send the vending machine into an Off state.

Task Description

After familiarising yourself with the business requirements for the software application, you are now required to do THREE tasks:

1.  Task 1: Choose a name for the digital solution. Put the name on the cover page of the word file along with the name of the student(s) in the group and their student number(s).

2.  Task 2: Create five UML models (one for each type) based on the description of  business  requirements.  Document  any  assumptions  you  made  (if  any) underneath each diagram.

3.  Task 3: Create three additional UML models that have not been detailed in the

description (or may have been hinted at). There are two options for these, either:

(a) Innovation Diagrams – Here we ask you to be creative and use your imagination to develop something new. You can consider this task as a suggestion for an additional feature, an innovation the application designer did not think of.

(b) Normal Operational Diagrams – These are normal operations that you would expect from a vending machine that has not been detailed in the text. For example, Coin operation where only one item can be purchased at a time, physical cash must be entered (credit card can only be done via the application), and change is dispensed at the same time as the item purchased.

The three UML models you are asked to create must be an activity diagram, a sequence diagram, and a state machine diagram.

To propose something genuinely new – you must keep the following in mind:

1.  Activity diagram cannot be the ‘Registration Process’ or the ‘Ordering and Payment’ system. We recommend returning to the use case diagram and thinking about a different business process.

2.  Activity  diagram and sequence diagram  must depict the same business process.

For both Innovation Diagrams and Normal Operation Diagrams a short description of the intended process also needs to be submitted per diagram. No more than 100 words. This is so we can assess your comprehension of UML from what you describe.

UML 2.5 Portfolio

All UML models MUST be created with Enterprise Architect (EA), and each diagram must be exported as an image and pasted into a Word document that MUST be submitted as well.

The word document must include an overview page containing a table of contents with meaningful headings. For example, "Activity Diagram" followed by the system’s name. In addition, each diagram may have assumptions underneath only if needed. It is recommendable for approximately 200 words (for the whole document) but can be less  or  more.  Also,  it  is  desirable  the  use  bullet  points.  Furthermore,  the  word document must have the pages numbered, and the diagrams must have a readable font size.

All models MUST be done in UML 2.5. This means it must comply with the tutorial material and, by extension, the OMG UML specification version 2.5 or Sparx Systems’ UML recommendations.

Please make sure that you comply with the modelling guidelines as follows:

1.  The models must be created with Enterprise Architect from Sparx.

2.  The first five models must represent the business case. This means you need to create the five diagrams using the information provided in the assignment.

3.  You must only model the automated part of the digital solutions. This means any manual activities not carried out by the system will not be represented in the UML models.

4.  You must follow appropriate modelling conventions (the rules) specified in the weekly tutorial files.

5.  You must capture the relationships between different types of UML models. This means:

•   The activity diagram must model the business process captured in one or more use cases of the use case diagram.

•   Activity diagram and sequence diagram must depict the same business process.

•   The  information  contained  in  the  sequence  diagram  should  match  the information captured in the class diagram.

•   State machine diagram must depict the states of a single object (over its lifespan); this object is captured as a class in the class diagram.

For Task 2 – the first five UML diagrams (see p. 6), you must have the following details in each diagram: