Systems Analysis and Design Chapter 01

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server farm

A large concentration of servers working together.

Technical Knowledge, Communication Skills, Business Skills, Critical Thinking Skills, Education and Certification.

A successful analyst needs

Business Process Model (BPM)

Graphically displays one or more business processes.

Herman Hollerith

IBM predecessor company was founded in 1896 by

Application Development, Systems Support and Security, User support, Database administration, Network administration, Web support, and Quality Assurance(QA)

IT group provides technical support includes seven main functions:

Management information Systems

Managers were the primary users.

Enterprise Computing

Refers to information systems that support company-wide operations and data management requirements.

System

Set of related components that produces specific results.

Data Flow Diagram

The model, which represents a school registration system.

Mission-critical system

The one that is vital to a company's operation.

Business Model

describes the information that a system must provide.

Electronic Data Interchange

electronic commerce between two companies used a data sharing arrangement

Waterfall model

the result of each phase is called a deliverable which flows into the next phase

Systems Analyst

valued member of the IT department team who helps plan, develop, and maintain information systems.

Radio Frequency Identification (RFID)

-The newest development in data acquisition -technology, which uses high-frequency radio waves to track physical objects

Data

Consists of basic facts that are the system's raw material.

Hardware

Consists of everything in the physical layer of the information system.

E-mail, voice mail, fax, word processing, spreadsheets.

Examples of User Productivity Systems

Enterprise Applications

Include order processing systems, payroll systems, and company communications networks.

hardware, software, data, processes,people

Information system five key components

users

Inside and outside the company who will interact with the system, and IT staff members

Computer-Aided Systems Engineering (CASE)

Is a technique that uses powerful software called CASE tools

Prototype

Is an early working version of an information system.

Project Management

Is the process of planning, scheduling,monitoring, controlling, and reporting upon the development of an information system.

Information

It is the data that has been transformed into output that is valuable to users.

Supply Chain Management

Most large firms and government agencies use it

Business Profile

Overview of a company's mission, functions, organization, products, services, customers, suppliers, competitors, constraints, and future direction.

stakeholders

People who have an interest in an information system

Transaction Processing Systems

Process data generated by day to day business operations.

Business Support Systems

Provide Job-related information support to users at all levels of a company.

Business Process

Specific set of transactions, events, and results that can be described and documented.

Systems Design Phase

To create a physical model that will satisfy all documented requirements for the system.

Strategic Plans

Top managers develop long-range plans called

Legacy Systems

When planning an information system, a company must consider how a new system will interface with older systems.

Structured Analysis

Which is a traditional method that still is widely used by system analysts

requirements modeling

You investigate business processes and document what the new system must do to satisfy the users.

agile methods

also called adaptive methods, which include the latest trends in software development,

Gordon Moore

co founder of intel , predicted that the number of transistors on an integrated circuit chip would double about every 24 months

Information System

combines technology, people, and data to provide support for business functions such as order processing, inventory control, human resources, accounting, and many more.

Service-Oriented

companies included consultants, vendors, software developers, and service providers.

Application Software

consists of programs that support day to day business functions and provide users with the information they need.

Processes

describe the tasks and business functions that users, managers, and IT staff members perform to achieve specific results.

systems requirements document

describes management and user requirements, costs and benefits, and outlines alternative development strategies.

Vertical System

designed to meet the unique requirements of a specific business or industry, such as Web-based retailer, medical practice, or an auto dealership

Groupware

enable users to share data, collaborate on projects, and work in teams.

Product-Oriented

firms that has manufactured computers, routers, or microchips

Joint Application Development (JAD)

focuses on team-based fact-finding, which is only one phase of the development process

Business Process Modeling Notation (BPMN)

includes standard shapes and symbols to represent events, process, workflows.

business rules

input data is transformed by

Systems Analysis And Design

is a step by step process for developing high-quality information systems.

Horizontal System

is a system, such as an inventory or payroll application, that can be adapted for use in many different types of companies.

RAD

is more like a compressed version of the entire process.

System Software

manages the hardware components, which can include a single workstation or a global network with many thousands of clients.

Modeling

produces a graphical representation of a concept or process that systems developers can analyze, test, and modify.

Supply Chain Management

refers to all the companies who provide materials, services, and functions needed to provide a product to a customer.

Information Technology

refers to the combination of hardware, software, and services that people use to manage, communicate, and share information.

Software

refers to the programs that control the hardware and produce the desired information or results

feasibility study

reviews anticipated costs and benefits and recommends a course of action based on operational, technical, economic, and time factors.

Systems Analysis Phase

to build a logical model of the new system.

preliminary investigation

to evaluate an IT-related business opportunity or problem

CASE tools

to help systems analysts develop and maintain information systems.

Systems Development life cycle

to plan, analyze, design, implement, and support an information system

Knowledge Management Systems

use a large database called a knowledge base that allows users to find information by entering keywords or questions in normal English phrases

JAD and RAD

use teams composed of users, manages, and IT Staff

Inference Rules

which are logical rule that identify data patterns and relationships.

System Request

which describes problems or desired changes in an information system or a business process.

Object-Oriented analysis

which is a more recent approach that many analysts prefer,


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