Chapter 1 Flashcards
What is systems analysis and design?
A step by step process for developing high-quality information systems
Information System
combines technology, people, and data to provide support for business functions
Systems Analyst
Helps plan, develop, and maintain information systems. Must be excellent communicators with strong analytical and critical thinking skills
System
a set of related components that produces specific results
Mission-Critical System
vital to company’s operations
Data
Basic facts that are the system’s raw material. Transformed into information. Stored in tables.
Information
Data that has been transformed into output that is valuable to users
5 Components of an Information System
Hardware, software, data, processes, and people
Hardware
Everything in the physical layer of the information system
Server Farm
A large concentration of servers working together
Moore’s Law
The number of transistors on an integrated circuit chip will double about every 24 months
Software
The programs that control the hardware and produce the desired information or results. Consists of systems and applications.
System software
Manages the hardware components. Can include a single computer or a global network. Also controls flow of data, provides data security, and manages network operations.
Application Software
programs that support day-to-day business functions and provide users with the information they need. Includes horizontal and vertical systems.
Enterprise applications
company-wide applications
Horizontal system
A system that can be adapted for use in many different types of companies
Vertical System
Designed to meet the unique requirements of a specific business or industry
Legacy Systems
Older systems
Processes
Describe the tasks and business functions that users, managers, and IT staff members perform to achieve specific results
Ecommerce
Internet-based commerce. Can be B2C or B2B
B2C
Business to consumer
B2B
Business to Business
Electronic Data Interchange
A data sharing arrangement . Enables computer to computer data transfer, usually over private telecommunications lines.
Supply Chain
All the companies who provide materials, services, and functions needed to provide a product to a customer.
Business Profile
An overview of a company’s mission, functions, organization, products, services, customers, suppliers, competitors, constraints, and future direction.
Business Process
A specific set of transactions, events, and results that can be described and documented
Business Process Model
Graphically displays one or more business processes
