DEVRY CIS 321 Week 3 Milestone 3

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• DEVRY CIS 321 Week 3 Milestone 3
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•  
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• PROCESS MODELING- Part I Synopsis
• The requirements analysis phase answers the
  question, "What does the user need and want from
  a new system?" The requirements analysis phase is
  critical to the success of any new information
  system! In this milestone we need to identify
  what information systems requirements need to be
  defined from the system users perspectives.
• The Data flow diagram (DFD) has gained popularity
  as a technique for expressing system requirements
  for two reasons
• It facilitates development, which often leads
  to building systems that better   satisfy user
  needs
• Data flow diagrams and narratives are easy for
  users to understand.
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• In this milestone you will first uncover external
  agents, processes and data flows that define the
  requirements for the proposed system and document
  that information. You will use that to build the
  Context Data Flow Diagrams.

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• Objectives
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• After completing this milestone, you should be
  able to
• Understand and perform the techniques for
  requirements discovery.
• Determine external agents (external entities)
  and their relationship with the
•  System, identify data   flows.
• Construct the Context DFD using VISIO.
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• Prerequisites
• Before starting this milestone, the following
  topics should be covered
• The problem analysis phase Chapters 3 and 5
• PIECES framework Chapters 3 and 5
• Problem analysis techniques Chapter 6
• Process modeling techniques Chapter 9
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• Assignment
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• Now that we have studied the current system and
  analyzed some of its problems and opportunities,
  plus gained approval to proceed, we can now start
  to identify the business requirements for the
  system and model them. In this assignment we will
  use our results of the previous Milestone. The
  results of this activity will identify the system
  requirements for the proposed system.
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3
After completing this milestone, you should be
able to Understand and perform the techniques
for requirements discovery. Determine external
agents (external entities) and their relationship
with the System, identify data   flows.
Construct the Context DFD using
VISIO. PrerequisitesBefore starting this
milestone, the following topics should be
covered The problem analysis phase Chapters
3 and 5 PIECES framework Chapters 3 and 5
Problem analysis techniques Chapter 6 Process
modeling techniques Chapter 9 Assignment Now
that we have studied the current system and
analyzed some of its problems and opportunities,
plus gained approval to proceed, we can now start
to identify the business requirements for the
system and model them. In this assignment we will
use our results of the previous Milestone. The
results of this activity will identify the system
requirements for the proposed system. Refer to
sample forms (below), and results from Milestones
1 and 2 for the information necessary to complete
the activities.