System selection means selecting the various hardware, software, and services that are needed for implanting the system. Before the system selection can be done, it is necessary to know the capabilities of required proposed system
The growth of the World Wide Web as a repository of information and knowledge; the development of web search engines such as Google and Yahoo to search this vast repository
During project initiation the project manager performs several activities that assess the size, scope, and complexity of the project, and establishes procedures to support subsequent activities.
Feasibility studies are almost always conducted where large sums are at stake. Also called feasibility analysis. A feasibility study is conducted in order to determine the success and minimize the risks related to the project. When it becomes certain that the specific project could be carried out pr...
the emergence of ubiquitous computing coupled with the desire to support user mobility in distributed systems
lthough Pine Valley Furniture has historically been a manufacturing company, it recently entered the direct sales market for selected target markets.
There are various techniques to gather data and facts of system. some of them re as follows : Record view and Background reading Interviews Questionnaires Group communication Presentation Site visiting Observation
Costs fall into two categories. There are cost associated with developing the systems and there are costs associated with a operating a system.
significant challenges were encountered and overcome. As the scope and scale of distributed systems and applications is extended the same and other challenges are likely to be encountered.
If another organization develops or runs a computer application for your organization, that practice is called outsourcing. Outsourcing includes a spectrum of working arrangements
The task of a web search engine is to index the entire contents of the World Wide Web, encompassing a wide range of information styles including web pages, multimedia sources and (scanned) books
The focus of project closedown is to bring the project to an end. Projects can conclude with a natural or unnatural termination.
Quantitative measure of degree to which a system, component or process possesses a given attribute For ex. No. of errors found per person hours expended Cost and Effort Estimation : Boehm’s COCOMO model, Putnam’s SLIM Model & Albrecht’s function model.
The primary role of a systems analyst is to study the problems and needs ofan organization in order to determine how people, methods, and information technology can best be combined to bring about improvements in the organization. A systems analyst helps system users and other business managers defi...
a very different style of underlying architecture from the styles mentioned above (for example client-server), and such systems typically employ what is known as distributed event-based systems.
As mentioned in the introduction, networks are everywhere and underpin many everyday services that we now take for granted: the Internet and the associated World Wide Web, web search, online gaming, email, social networks, eCommerce, etc. To illustrate this point further, consider Figure 1.1 , wh...
the wide range of applications in use today, from relatively localized systems (as found, for example, in a car or aircraft) to globalscale systems involving millions of nodes, from data-centric services to processorintensive tasks, from systems built from very small and relatively primitive sensor...
Defining the general project information includes obtaining the name of the project and project manager and the starting or ending date of the project.
Management should not be lenient on part of documentation, management should never say like “ as time running short , so just create the system and make the documentation later”. Phase should not be considered complete until documentation is done. Coding should not be considered done unless its h...
Project execution puts the baseline project plan into action.
Data-flow diagrams are versatile diagramming tools.
concurrency of components, lack of a global clock and independent failures of components and the ability to work well when the load or the number of users increases – failure handling, concurrency of components, transparency and providing quality of service
A real-time system is any information processing system which has to respond to externally generated input stimuli within a finite and specified period A distributed system is one in which the components of an information system are distributed to multiple locations in a computer network.
Collection of information is at the core of systems analysis.
As stated earlier and shown in Figure 5-1, the two parts to systems analysis are determining requirements and structuring requirements.
In the last chapter, you read how Pine Valley Furniture’s management began the WebStore project—to sell furniture products over the Internet.
Pine Valley Furniture (PVF) Company manufactures high-quality wood furniture and distributes it to retail stores within the United States. Its product lines include dinette sets, stereo cabinets, wall units, living room furniture, and bedroom furniture.
The Web began life at the European centre for nuclear research (CERN), Switzerland, in 1989 as a vehicle for exchanging documents between a community of physicists connected by the Internet [Berners-Lee 1999]. A key feature of the Web is that it provides a hypertext structure among the documents ...
Reuse is the use of previously written software resources in new applications. Because so many bits and pieces of applications are relatively generic across applications, it seems intuitive that great savings can be achieved in many areas if those generic bits and pieces do not have to be written an...
Process modeling involves graphically representing the processes, or actions, that capture, manipulate, store, and distribute data between a system and its environment and among components within a system.