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EZGas is a crowdsourcing service that allows users tocollect prices of fuels in different gas stations and locate gas stations in an area, along with the prices they practice
Stakeholders
Stakeholder name
Description
Administrator
Uses the application to manage purchase and sharing of fuel price. IT Adminstrator, DB Adminstrator
Developer
Develops the application. BackEnd , FrontEnd , Infrastructure
Gas Station
Uses the application to insert the price of the fuel
User
Uses the application to fine the nearest gas station with the lowest price
Google Map
it does not use the application. the application uses it's services to collect the location of gas stations
Context Diagram
Interfaces
Actor
Logical Interface
Physical Interface
Administrator
GUI
Screen, keyboard
User
GUI
cellphone
Gas Station
GUI
Screen, keyboard
Google Maps
Web API
internet connection
Stories and personas
User 1 : Andy is a university student. the distance from his university to his house is far so he rented a car. Spending money for fuel is important to him because he does not earn so much money from his part time job.
User 2 : Jessica is a teacher , she has 3 children. Every mornings she prepares children for going to school with her. It usually takes time to make her children ready for school so she prefers to choose the nearest Gas station for her car's fuel.
User3 : Stephen has graduated from university recently and he has started his job a month later. He got loan and bought a new car for reaching his office. the price of fuel is important for him because he has a few savings and he pays more than 50 percents of his salary each month for the loan.
He works also in nights and he has usually some problems for waking up in the morning so he does not have enough time to go to the cheapest Gas station. He wants a Gas station which is in his path from his house to his office also he wants to know the price of those stations to make a better decision.
Functional and non functional requirements
Functional Requirements
ID
Description
FR1
Record the price of fuel in each Gas station
FR2
Record the place of each Gas station
FR3
Show a list of Gas stations can be sorted by the price ascendingly and the nearest location
FR4
Record the location of each user
FR5
Manage Gas stations
FR6
Manage the accounts of users
FR7
Calculate the nearest Gas station with the lowest price
FR8
Show the list of the price
FR9
Produce reports of the price of each Gas station during a year
Non Functional Requirements
ID
Type (efficiency, reliability, .. see iso 9126)
Description
Refers to
NFR1
Usability
Application should be used with no training by any users
All FR
NFR2
Performance
All functions should complete in < 0.5 sec
All FR
NFR3
Portability
The application runs on mobile devices
All FR
NFR4
Portability
The application (the reports and data) should be portable from a PC to another PC in less than 5 minutes
All FR
NFR5
Maintainability
The application should be updated every month for fixing the bugs
All FR
NFR6
Reliability
The application should show the price correctly
All FR
NFR7
Reliability
The application should show the direct location of each Gas station
All FR
Use case diagram and use cases
Use case diagram
Use Cases
Use case 1, UC1 - FR1 Record the price of fuel in each Gas station
Actors Involved
Gas station , Google map
Precondition
Internet connectivity, Google map service availablity, Account of Gas station has been registered, Logged in into the account
Post condition
The price will be added to the DB. It should be updated in the application
Nominal Scenario
The Gas station inserts the price of the fuel in the web portal after the registration and login
Variants
Use case 2, UC2 - FR3 Show a list of Gas stations can be filtered by the price and location of the user
Actors Involved
User, Gas station , Google map
Precondition
Calculate the near Gas stations, Internet connection, availablity of google map service
Post condition
Calculate the distance to the selected Gas station , Route the path
Nominal Scenario
Shows the list of Gas stations in a particular area. the list can be sorted by the nearest Gas station and price
Variants
Use case 3, UC3 - FR5 Manage Gas station
Actors Involved
Administrator , Gas station
Precondition
Internet connectivity
Post condition
Gas station can be removed
Nominal Scenario
Administrator can remove or edit the information of a Gas station
Variants
Use case 4, UC4 - FR9 Produce Reports particularly for each Gas station or Generally
Actors Involved
Administrator
Precondition
Internet connectivity
Post condition
reports of the price of fuel of each Gas station will be available in any document format
Nominal Scenario
Administrative can obtain information about the price or Gas stations in any document format
Variants
Relevant scenarios
Scenario 1
Scenario ID: SC1
Corresponds to UC1
Description
The Gas station inserts the price of the fuel in the web portal
Precondition
Account of Gas station has been registered, Logged in into the account
Postcondition
The price will be added to the DB. It should be updated in the application
Step#
Step description
1
The Gas station create an account if it does not have.
2
The Gas station login into its account
3
insert or update the price of the fuel
Scenario 2
Scenario ID: SC2
Corresponds to UC1
Description
The Gas station inserts the price of the fuel in the web portal , the price is not in a correct format
Precondition
Account of Gas station has been registered, Logged in into the account
Postcondition
The price will not be added to the DB or updated in the application. shows a warning to the Gas station account
Step#
Step description
1
The Gas station create an account if it does not have.
2
The Gas station login into its account
3
insert or update the price of the fuel , the price is not in a correct format
