Chapter 1.3

• Processes - define the tasks and business functions that users perform to achieve specific results
• People - operate the system, provide inputs, consume outputs, and perform manual processing activities
• Internal users - administrators, managers, technicians, sales staff, and corporate officers
• External users - customers tracking orders on the company’s website and suppliers using the customer’s system to plan manufacturing schedules
• Modeling - produces graphical representations for analysis, testing, and modification by system developers
• Techniques - include data flow diagrams, entity relationship diagrams,

  and unified modeling language diagrams
• Business or Requirements model - defines required system information
• Data model - illustrates data structure and design
• Object model - describes objects combining data and processes
• Network model - depicts telecommunication link design and protocols
• Process model - outlines logic for programmers to write code modules
• Prototyping - tests system concepts and examines input, output, and user interface before final decisions
• Prototyping - an early working version of a system
• Computer-Aided Systems Engineering (CASE) Tools - also known as computer-aided software engineering, utilizes powerful software (CASE tools) to aid systems analysts in developing and maintaining systems
• CASE - provides a framework for systems development and supports various design methodologies