Software applications undergo software development life cycle (SDLC) which involve requirement gathering, system design, application development, quality analysis and maintenance. Different strategies such as extreme programming, agile, and scrum can be employed to achieve efficient software development and maintenance plan. System analysis and design models built using object oriented methodology and UML help in understanding the purpose of software application and act as blueprint to implement the software. 2.1 Object Oriented Analysis and Design Object–Oriented Analysis and Design (OOAD) approach is important for successful planning and execution of web applications which can function efficiently over long period of time. OOAD approach …show more content…
Functional requirements are operations, technical computation and data processing that explain the functionality of the application. Non-functional requirements describe expected behaviour of the functionality specified for the system. Non-functional requirement specifies the design constraints and characteristics that need to be taken care of to satisfy user requirements. Non-functional requirement specifies the behaviour of the system with respect to various quantifiable attributes like performance, availability, etc. [8]. System design specifies plan to implement functional requirements whereas system architecture specifies plan to implement non-functional requirement. Functional requirements can be explained using use cases and non-functional are listed in a table. Functional Requirements for Travel Helper are explained using use cases models. Non-Functional Requirements are listed in Appendix A. 2.2.2 Use Case Use case is a behavioural diagram. It depicts the sequence of actions a user of a system can perform to achieve functionality of system. User has a role in the system which needs to be satisfied. Use Case describes complete details of the role, condition and action corresponding to functional requirement of the system. The various sections of use case model are explained below. 1. Use Case Name: Describes the name of the user action. 2.
It is generally accepted that developing use case scenarios is also useful as a means for eliciting requirements, and ensuring that the goals captured are sufficient to support desired system behaviours. Furthermore, the use case scenarios are useful, and that it is important to use a ‘‘textual description of each use case to facilitate understanding’. therefore the unified methodology should support both techniques (e.g., use cases and use case scenarios) to help the analysts identify the key communications/interactions between
Questionnaires are also disseminated to gather opinions from end users. In addition, analysts will observe the way the current system is used to perform day-day activities, and collect data. Analysis will be conducted on the different types of documentation used to understand certain rules, processes and procedures. Finally, a joint application design (JAD) can be conduct by way of a meeting with end users. The purpose of the JAD is to gather requirements that all parties can agree on (Valacich et al,
Choosing a proper method for software design is completely depended upon the requirements and end products of the company. These requirements and goals might change in the process of development of software depending upon the decisions of stakeholders, developers and system analysts.
The Use Case analysis is a method which focuses highly on the systems functional Requirements and when completed will consist of a Use Case Model. The model consists of actors, Use cases, use case scenarios and other criteria which helps represents the use case. Within a use case Model there are many relationships (generalization, include and extends) which help represent the flow and functionality of the system and its entity’s.
When it comes to systems development today, the most important decision every development team faces is which approach to use. Given the fact that information technology is continually growing, it is extremely important to shorten the time spent on the development as much as possible. This, however, is sometimes easier said than done. Because there are situations where the complexity of the system requires a huge amount of time to develop, it is much wiser to slow down and do things the right way rather than hurry and be forced to repeat the process again. Therefore, it is vital to choose the best approach. Although there are several different methodologies that can be used when it comes to systems development,
In this assignment I will be using assignment 2:1 case study to my system requirements. In this case study we learn about a company called URCovered, which is an auto insurance companies and they were developing a mobile application to improve their customer services and customer experience in their claims management department. To develop this mobile applications projects this will required a system requirement model, a requirement model, data process model, a DFD, data dictionary, object modelling and final a use case diagram
Use Case Diagram is one of the models of UML Language that is used to analyze, construct, design, and document the artefacts of Software Systems.
Iterative development is a way of breaking down the software development of a large application into smaller chunks. An iterative life cycle model does not attempt to start with a full specification of requirements. The iteration involves the redesign and implementation of iteration is to be simple, straightforward, and modular, supporting redesign at that stage or as a task added to the project control list. The level of design detail is not dictated by the iterative approach.
Like the logical processing model a context data flow diagram defines the scope and boundary for the system and project. Because the scope of any project is always subject to change; the context diagram is also subject to constant change. A context diagram is referred to as being another representation an environmental model. Finally, the initial project scope can be defined using a context diagram. A project's scope is important in that it defines what aspect of the business a system or application is supposed to support.
Extensively Involved in Installation, Configuration, and Administration of Microsoft Office SharePoint Server 2010/2013 on medium farm environment
Though many people interchange system engineering models and software engineering life cycle models, they are defined as two different approaches to software development. System engineering is the technical and technical management process that results in delivered products and systems that exhibit the best balance of cost and performance. As the program progresses from one phase to the next one, so does the system engineering process. It deals with the overall management of engineering project during their life cycle. Its main focus is knowing what the clients and end users wants and needs are satisfied and developing just that all the way through the system’s entire life cycle. Whereas, on the other hand, software engineering focuses on the quality of the product or system, how cost effective it is, is it done within the time-constraints given, whether it is easy to maintain and enhance, and does it work as the requirements defined. Its main focus is on delivering a product that meets the requirement specifications. There are so many models to choose from, as it all depends on what the project needs and entails. Depending on the requirements, allows for the choice of what mode to use.
In this article the author looks at the requirement analysis process by the task. There are similarities in this model and the use case model. However in the use case model there is always a actor and one or many use cases the actor will perform to achieve the goal.
The quality of a software highly depend on the process that is followed in the organization for the projects. There are a large number of projects failed in the software nowadays due to lack of a SDLC (Software Development Life Cycle) model or selecting a poor SDLC model for their projects. “By selecting right software process model a better and high quality product can be found within budget and time” (Neha & Satinder Pal, 2011). “SDLC models are tools that allow the development team to correctly follow the SDLC Steps to create software that meets a business need” (Purcell, n.d).
Object-Oriented Programming enables programmers to program by modeling the real world instead of defining the logic of how the world works. It focuses more on what makes up an object rather than what the object does. Programmers can focus on creating small components or objects, and group them together based on their relationships to build a larger object, which can be built upon again in future. The process of developing the paradigm consists the following steps: Encapsulation, Inheritance, Data Abstraction, and Polymorphism.
The complexity of new applications and need to cater different industries having different software requirements led to the evolution of object-oriented approach. Object-oriented programming originated as a value addition to previous developments in the software industry and old programming languages that had little or no data abstraction. Data abstraction is needed to deal with complex algorithms. The concept of objects which is the basic building block of object oriented programming was introduced in Simula (Dahl and Nygaard, 1966), has