Information Systems in the Small Enterprise

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Information Systems in the Small Enterprise

• By
• Bob Larson

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Information Systems Defined

• Information system
• Coordinated collection of resources that
• Gather and transform data into information
  products
• Services that help the enterprise perform its
  designed functions
• Information system hierarchy
• Associates different classifications of
  information systems with different audiences

Systems Analysis and Design for the Small
Enterprise
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Information System Hierarchy
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Enterprise
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Three Significant Trends

• Emergence of small enterprise computing
• Internet as a dominating technology
• Maturation of application software
• Results
• Influence the evolution of information systems
• Provide opportunities for the entrepreneurial
  systems analyst

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Enterprise
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Small Enterprise Characteristics

• Owner participation
• Economic constraints
• Competitive pressures

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Info Needs of the Small Enterprise

• Common for any enterprise
• Production and inventory
• Personnel management
• Financial reporting
• Marketing, sales and service support
• Customer relations

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Enterprise
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Information System Components

• Six major components
• People
• Procedures
• Software
• Hardware
• Networks
• Data

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The Role of the Analyst

• Agent of change
• Problem-solving strategist
• Group facilitator

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Software Products

• Integral to the analysts work
• Off-the shelf application software
• Software suites
• Computer Assisted Systems Engineering (CASE)
• Object-oriented application software

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Software

• System Software
• Operating systems
• Firmware
• Utility
• Application Software
• Horizontal
• Vertical
• Turnkey
• Customizable Software
• Third-generation programming languages
• Fourth-generation programming language (4GL)
• Object-oriented programming language
• 4GL products

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Enterprise
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Ethics Quiz

• Under what circumstances or conditions, if any,
  do you feel it is appropriate to install a
  clients software on your computer?

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Enterprise
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Systems Development Life Cycle (SDLC)

• Five major phases
• Analysis
• Design
• Development
• Implementation
• Maintenance

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The Circular SDLC Model
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The Recurring SDLC
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The Enhanced SDLC

• Recurring nature of the SDLC
• Blending of several phases of the SDLC
• Influence of the user throughout the SDLC
• Addition of many powerful tools to assist the
  analyst

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Enterprise
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Fin