1.1 Analysis Class Diagram:
In the paradigm of software engineering, the class diagram is a part of UML that represents the static structure of an application. The class diagram, as the name suggests, represents the classes of the application. These classes has attributes and operations.
The class diagram are mainly used for describing the elements of application in real world. The class diagram also provides the way of creating modules with the assistance of UML utilizing the operations and attributes. The paths among the classes can be visualized through the association and aggregation.
The class diagram represented in figure 1, shows three classes represents three real world elements of the application. The association among these three classes shows the relation among these entities and how they communicate with each other. Each of these classes have its own attributes that shows how it represents the real world elements. These classes are tour, tour Driver and ClericalAssistant. The operations of these classes shows how the attributes will be processed to meet organization requirement. The clerical assistant will do the work of creating the tour by entering its data through recordNewTour() method.
1.2 Communication Diagram:
The UML communication or collaboration diagram, somewhat alike sequence diagram, is an aspect of UML interaction diagram. This diagram visualizes the process of objects interacting with each other. The collaboration diagram is considered as an extension of object diagram. The communication diagram visualizes how the messages are transmitted from one object to another.
The communication diagram can accurately represent the flow of the messages among the objects of the classes. This makes it possible to understand how the operations in the class diagram are executed in the application. The messages are shown through an arrow to visualize from which object the message flows.
The communication diagram represent the objects that represent the classes in the class diagram. These objects are connected to each other through a line. For three classes, three objects are created. The tourDriver and tour objects can be more than as a clerical assistant can created more than one tour and these tour can have different tour drivers. The recordNewTour() message is going from clerical assistant object to the tour object. This implies the clerical assistant will invoke this method to start recording a new tour.
The sequence diagram is a part of UML diagram. It is a kind of interaction diagram that visualizes the details of the operation showed in the classes of figure 1. Like the communication diagram, the sequence diagram shows the interaction among the object of the classes. The messages are shown based on the time it is executed.
The sequence diagram has the ability to capture the behaviour of the system. The sequence diagram perfectly captures the model of interaction that occurs between active objects of the application. These high level interactions can represent object instances in between the collaboration which can appropriately realize the use cases.
The sequence diagram has three objects and one of them is an actor. The actor is the clerical assistant. The clerical assistant starts adding a new tour in the system and the application initializes the recordNewTour() method. This method calls for the attributes in the tour class. This tour class then calls the addDriver() method. This method has a parameter which has driver ID. Based on this ID, the application assigns the driver. After the driver is assigned, the application replies to the clerical assistant that new tour is stored.
The Computer Aided Software Engineering tools or CASE tools are generally used for supporting the development and maintenance task of software development project. The CASE tools supports all kind of modelling elements of an application or large system and various system designs can be done through these CASE tools. The CASE tools are also capable of automating the SDLC activities. The enterprise architecture, the CASE tool used in the assignment, has been a greatly important factor in designing three UML diagrams. The CASE tool has provided all the basic modelling elements that were essential for designing the diagrams. The Enterprise Architecture has been able to capture both the structural and behavioural aspects of the Wide World Tour Management System or TMS. The capability of Enterprise Architecture was not limited to these UML diagrams only, it could allow designing the database and other parts of the application. The enterprise architect allowed putting all the elements of the class, communication and sequence diagrams perfectly. The classes has been done accurately along with showing attributes and operations.
It was easy to modify the UML diagrams after those diagrams were created. The CASE tool allowed to build the understanding of the system without even considering the coding aspect. The CASE tool allowed adding new aspects and requirements of the systems at any stage of the design. The alterations in the name, type of the classes, attributes, messages or event lifelines were extremely easy. This allowed in putting most of the effort and concentration on the system analysis and design task not in understanding how the CASE tool Enterprise Architect is used. The Enterprise Architect provided very easy to use user interface and user interaction quality. The use case diagram and use case description provided as a reference for the case study of adding new tour provided an in depth understanding of the behaviour of the system. This is limited to only adding a new tour operation of the application. In order to justify the use case to the real case study of Wide World Tour Management System or TMS, all the aspects of the system needed to be recognized and analysed. A predefined approach toward the case study of TMS was not appropriate. Therefore, a tool was need that could increase the possibility of executing the system analysis part in a customized way. The case tool provided the perfect atmosphere for capturing and demonstrating the core operations of the system.
The UML models have been utilized for creating both the structural and social models. Maybe, the greatest preferred standpoint of UML model is that it enables the designer to model both the structural and conduct model of a framework. This implies through the UML models just, the designers can dissect and design the inward structure, messages going through framework components, correspondence, interface necessities, communication rudiments and the sky is the limit from there. The UML modelling tradition has such a significant number of models that it can cover every one of the parts of a huge data framework. The UML is equipped for getting both the static and dynamic parts of a framework. It is critical to make an UML diagram to catch the fundamental designs of a framework through which the other complex models can be made.
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