Chapter 1 : Introduction to Systems Analysis and Design
Information helps companies:
• Increase productivity
• Deliver quality products and services
• Maintain customer loyalty
• Make sound decisions
• Use of information technology is vital for organizational success
Information Technology (IT) : Combination of hardware and software products
and services used to manage, access, communicate, and share information
Systems Analysis and Design: Step-by-step process for developing high-
quality information systems
Information systems: Combination of technology, people, and data to
perform certain business functions
What Does a Systems Analyst Do?
◦ Plans, develops, and maintains information systems
◦ Manages IT projects, including tasks, resources, schedules, and costs
◦ Conducts meetings, delivers presentations, and writes memos, reports, and
documentation
Information System Components
System: Set of related components that produces specific results
Mission-critical systems are vital to a company’s operations
All systems require input data
◦ Data: Basic facts that serve as raw material
• Information: Data transformed into output
, Hardware
◦ Physical layer of the information system
Software
◦ Controls hardware
◦ System software
◦ Application software
Horizontal system
Vertical system
Legacy system
Data : Stored in tables
Processes : Describe the tasks and
business functions performed to achieve specific results
People: Stakeholders: Individuals interested in an information system
The Internet Model
◦ Ecommerce (electronic commerce)
◦ User interface - Enables communication between a data-base management
software and a web-based server
Mobile devices interact with the system using apps
◦ Sectors
B2C (business-to-customer)
B2B (business-to-business)
B2C (Business-to-Customer)
◦ In a single convenient session, customers can:
Do research and compare prices and features
Check availability and arrange delivery
Choose payment methods
, B2B (Business-to-Business)
◦ Most firms use supply chain management (SCM) software, which helps
businesses manage inventory levels, costs, alternate suppliers
Modeling Business Operations
Business Profile: Overview of a company’s mission, functions, organization,
products, services, customers, suppliers, competitors, constraints, and future
direction
Business Process: Specific set of transactions, events, and results that can be
described and documented
Business process model (BPM)
Business process modeling notation (BPMN)
Business Information Systems
Current Method
◦ All employees use office productivity systems
◦ Operations users require decision support systems
◦ Systems are defined by their functions and features
Enterprise Computing
◦ Supports company-wide operations and data management requirements
Enterprise resource planning (ERP) systems provide cost-effective
support for users and managers throughout the company
Transaction Processing (TP) Systems:
◦ Processes data generated by day-to-day business operations
◦ Examples - Customer order processing, accounts receivable, and warranty
claim processing
Information helps companies:
• Increase productivity
• Deliver quality products and services
• Maintain customer loyalty
• Make sound decisions
• Use of information technology is vital for organizational success
Information Technology (IT) : Combination of hardware and software products
and services used to manage, access, communicate, and share information
Systems Analysis and Design: Step-by-step process for developing high-
quality information systems
Information systems: Combination of technology, people, and data to
perform certain business functions
What Does a Systems Analyst Do?
◦ Plans, develops, and maintains information systems
◦ Manages IT projects, including tasks, resources, schedules, and costs
◦ Conducts meetings, delivers presentations, and writes memos, reports, and
documentation
Information System Components
System: Set of related components that produces specific results
Mission-critical systems are vital to a company’s operations
All systems require input data
◦ Data: Basic facts that serve as raw material
• Information: Data transformed into output
, Hardware
◦ Physical layer of the information system
Software
◦ Controls hardware
◦ System software
◦ Application software
Horizontal system
Vertical system
Legacy system
Data : Stored in tables
Processes : Describe the tasks and
business functions performed to achieve specific results
People: Stakeholders: Individuals interested in an information system
The Internet Model
◦ Ecommerce (electronic commerce)
◦ User interface - Enables communication between a data-base management
software and a web-based server
Mobile devices interact with the system using apps
◦ Sectors
B2C (business-to-customer)
B2B (business-to-business)
B2C (Business-to-Customer)
◦ In a single convenient session, customers can:
Do research and compare prices and features
Check availability and arrange delivery
Choose payment methods
, B2B (Business-to-Business)
◦ Most firms use supply chain management (SCM) software, which helps
businesses manage inventory levels, costs, alternate suppliers
Modeling Business Operations
Business Profile: Overview of a company’s mission, functions, organization,
products, services, customers, suppliers, competitors, constraints, and future
direction
Business Process: Specific set of transactions, events, and results that can be
described and documented
Business process model (BPM)
Business process modeling notation (BPMN)
Business Information Systems
Current Method
◦ All employees use office productivity systems
◦ Operations users require decision support systems
◦ Systems are defined by their functions and features
Enterprise Computing
◦ Supports company-wide operations and data management requirements
Enterprise resource planning (ERP) systems provide cost-effective
support for users and managers throughout the company
Transaction Processing (TP) Systems:
◦ Processes data generated by day-to-day business operations
◦ Examples - Customer order processing, accounts receivable, and warranty
claim processing
