System Analysis and System Requirements Object Modeling, Process Modeling, and Strategies for System Analysis and Problem Solving April 6, 2005 Object Modeling A class can be described as a collection of objects of similar type. These objects often share the same attributes, operations, methods, relationships, and semantics. Additionally, once a class is defined any number of objects can be created and associated to that class. For example, beagles and boxers represent different breeds (i.e. instances) of "dogs" which also can be viewed as a distinct class. Furthermore, defining classes, as part of the object modeling process is not that different from the traditional system analysis process, which seeks to achieve a goal (i.e. …show more content…
In addition, to organizing the flow of data throughout a system, logical models also provide means of bridging the gap of communicating information to end-users in a non-technical manner while also preserving the requirements. Finally, logical models encourage creativity and reduce the risk of missing requirements, which are normally missed because of pre-occupation with technical details. 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. An event diagram represents the final area of my discussion of the Process Modeling method. An event diagram represents a context diagram that focuses on the inputs, outputs, and data store interactions for a single event. In addition, most event diagrams are also representative of a single process, which can be referenced back to the event identified for a decomposition diagram. Event diagrams therefore are valuable for identifying and addressing event driven factors, which when combined with other
Project scope defines the goals of the project and the budget of both time and money that has been allocated to achieve the objectives. For the best results to be achieved, both the definition and the allocated budget must be precise and detailed. A good process scope document will define specifically the tasks to be completed or the delivered results. The project scope is important because it will define the specific date for which the deliverables
The project scope statement is a key element in any new project. It is used to outline the results that the project will produce and the terms and conditions under which the work will be performed. Upper management, the requestor of the project and the project team need to all agree on the
Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency. In the Unified Modeling Language, activity diagrams are intended to model both computational and organizational processes (i.e. workflows). Activity diagrams show the overall flow of control.
As the information system is designed, implementation decisions describing how the system will work are made. Data flow diagrams offer those implementation details, including data stores that refer to files and database tables, programs and human actions that perform processes. The automated parts of the system are differentiated from the manual parts by the human-machine boundary (Dennis, Wixom,
A project scope is a way to describe the major deliverables of a project and this includes key milestones, high level requirements, assumptions and constraints. A projects scope is a useful way to make decisions for the future of the project if changes are needed. The projects scope also defines boundaries of a given project and it clarifies what can be delivered and what is expected to be delivered ("Match ware", 2013). The scope explains the boundaries of the project and the responsibilities of every one working on that project. This helps who ever is working on the project by defining guidelines and helping them to remain focused. The projects scope is a very important part of the SDLC because this serves as a manual for how the project will be completed including important details, deliverables, tasks, costs, and deadlines.
This model demonstrates the data attributes logical entities and relationships between these entities within a business function. It also helps to create the physical data model. Moreover, it shows more details while integrate business logic and business rules. This model is used to describe the domain concept and their relationship of the domain problem.
A class is like a cookie-cutter in that it has the power to create multiple items that are alike in some ways: they all have the same number and type of fields, while their values can differ. You can compare this to all cookies having the same shape, but it is unclear how the differences between individual cookies map to the differences between objects that are class-mates; in my mind, two Cartesian coordinates with different X and Y values are much more different than similar, certainly much less alike than two cookies with the
“A Business Process Explorer: Recovering and Visualizing E-Commerce Business Processes” is a research paper developed by the author: Jin Guo, King Chun Foo, Liliane Barbour, and Ying Zou. The focus of this paper is a business process and how it affects e-commerce systems. Business process can be defined as an assortment of linked, designed actions or responsibilities that are linked together by control flow foundations. E-commerce uses business processes to systematize the day-to-day work flow of an organization.
Logic models represent a visual way of expressing the rationale or thought behind a program. Two other forms of expression may help concurrently support the development of a logic model, or accompany the model if it is to be communicated through written materials.
“A logic model is nothing more than a concept map that visually describe the logic of how your program is suppose to work” (Grinnell, Gabor, Unrau, & Grinnell,
Process Flowchart - The process flowchart is a description of how the various processes of the ISO 9001 QMS interact with each other. The process flowchart is required in ISO 9001:2008 section 4.2.2.
The interview session has been done by include an open-ended and closed-ended question which are related to the implemented project. Next, sampling technique is executed by system analyst who does evaluation to the current system or prototype. These processes give feedback in evaluation form that filled after tested the system. Lastly, observation is performed by using questionnaire form. According to Burch (1992), the questionnaire is analyzed and transform into structured form that easy to understand. After all information has been collected, structuring of system requirement takes place. It focused on development process modeling which perform “graphically representing the process, or actions, that capture, manipulate, store, and distribute data between a system and environment” (Hoffer, George, & Valacich, 2012, p. 182). In this step, Data flow diagram (DFD) is structured by system analyst using special tools and techniques to create a decision table. According to Hoffer, George and Valacich (2012), decision table is a “diagram of process logic where the logic is reasonably complicated” (p. 200). This table is useful to help system analyst to make a decision toward the project. Then all information’s gained from this phase are documented in System Analysis Report (SAR) that acts as a guideline or reference to the future system development project (Burch, 1992).
The Unified Modeling language (UML) is defined in the Software Engineering as a form of defining the design of the system. It is a way to envision the system architecture in the form of a diagram. The paper discusses about the genesis of UML modeling and the forms of diagrams which are used in the UML modeling based on the survey conducted on various employees based on their skill set and level of experience in the software engineering field. Now we will go through each aspect of the UML modeling and try to derive conclusions on how far was UML modeling has been able to penetrate into day to day activities of this field and also discuss about the complexities associated with each components of the UML modeling as well as pros and cons.
The purpose of this report is to give information on the subject known as Logical reasoning and its use in Computer Science and computers in general. A historical background behind logic and Logical reasoning is firstly given, followed by an overview of the modern subject and the types it’s divided into. The types are then explained. The overlap between the field of logic and that of computer science is also given an explanation. The report ends with a brief overview on the subject and its tie to computer science and computing.
A comprehensive project scope analysis serves several benefits that permit a company to guide the dream of a project to a successful completion. One benefit is transforming the idea of the project into a working concept. Once the concept is developed, project details can be mapped out. Scope analysis outlines each step of the project in a detailed manner. The primary benefit to this is it aligns the project so that the final product will be consisted with the original goals/objectives. By outlining each step, scope analysis increases the likelihood that the project will stay within budget and time constraints as well as meet predetermined specifications and quality parameters.