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Official Requirements Document

Authors: Giuseppe Petraglia, Manuel Sabelli

Date: 29/05/2019

Version: 5

Contents

Abstract

A map with all the price of the gas station to inform the people which is the nearest and cheapest gas station around theirs. Both the people and the owner of gas station can share the location and the price of a gas station if they want.

Stakeholders

Stakeholder name Description
Owners The person who owns the gas station and who can add or remove his gas stations. He also set and update the price of gas station
Users Use the application directly. They are interested where the stations are and the prices of gas station
Developer Impacted in case the product to be developed is too complicated, or untestable, or with poorly written requirements
MAP API Changes the API of the app

Context Diagram and interfaces

Context Diagram

Interfaces

Actor Logical Interface Physical Interface
Users Screen Touch Screen
Owner Screen Touch Screen
Map API Web Services (A function used to take Google Maps and to upload the gas station) Internet Connection(API)
Developer Screen Touch Screen

Stories and personas

Aldo is going to the sea in a beautiful summer day with his family: Ramona his wife, Giacomino and Andrè his sons. During the trip the gas of his machine is going to finish and he checks on EZGas app the nearest and the cheapest gas station to full his machine. Without this app he should probably go to an other gas station and he probably pay more money than the gas station find on the app. In unlucky way he could finish the gas in his machine and he must find a gas station on foot.

Jonh buy a gas station and he registers his self on EZGas to put his gas station on the app and set the price of gas to rase money and to get noticed by peolpe that want buy gas for theirs machine. Every day he uodates ,if necessary, the price of gas of his gas station.

Functional and non functional requirements

Functional Requirements

ID Description
FR1 The owner shall be able to registers his self on the app
FR2 The owner shall be able to set the price of gas on his gas station the first time that he registers his gas station
FR3 The user shall be able to visit the map on the app
FR4 The owner shall be able to update the price of FR1 every day
FR5 When FR1 the system will put the gas station on the MAP
FR6 When FR3 the system will show him all the gas stations on the map
FR7 The Developer shall be able to update the system when he wants

Non Functional Requirements

ID Type (efficiency, reliability, .. see iso 9126) Description Refers to
NFR1 Usability Application should be used with no training by Users FR3 FR6
NFR2 Performance All functions should complete in < 0.5 sec All FR
NFR3 Portability The application runs on Android and IOS All FR
NFR4 Portability The application can be downloaded by the store All FR
NFR5 Localisation Decimal numbers use . (dot) as decimal separator

Use case diagram and use cases

Use case diagram

Use Cases

Use case 1, UC1 - FR1 Register Station

Actors Involved Owner
Precondition Station S exists, Owner O exists
Post condition S registered on the system
Nominal Scenario Owner registers his gas station on the system
Variants Owner O has not enough money to buy a station

Use case 2, UC2 - FR2 Set Price

Actors Involved Owner
Precondition Station S exists, station has no price
Post condition S price is set
Nominal Scenario Owner sets the price of his gas station
Variants

Use case 3, UC3 - FR3 Visit the app

Actors Involved User
Precondition User U exists, he want refull his maschine
Post condition User has refull the machine
Nominal Scenario The User use the app to look the map
Variants

Use case 4, UC4 - FR4 Updte the price

Actors Involved Owner
Precondition Station S exists, the price of his station is changed
Post condition S price is updated
Nominal Scenario When aprice changing is noticed, the Owner updates the price of his gas station
Variants

Use case 5, FR7 Update the system

Actors Involved Developer
Precondition System S exists
Post condition S is updated
Nominal Scenario Developer updates the System
Variants

Relevant scenarios

Scenario 1

Scenario ID: SC1 Corresponds to UC1
Description The User use the app
Precondition He want refull the tank of his gas car
Postcondition The Users known where is the nearest gas station
Step# Step description
1 The user visit the app
2 The user activates his geolocation on his mobile
3 The Map shows him all the gas station near him

Scenario 2

Scenario ID: SC2 Corresponds to UC1
Description The owner registers his gas station
Precondition The owner wants let know his gas station
Postcondition The gas station in on the map of the app
Step# Step description
1 The owner visit the app
2 The owner registers the data of his gas station and set the price of gas
3 The gas station in on the map