Transcript MSS and alternatives views of the subject

MSS Development Issues
Chapter 7 MSS development:
Approaches and techniques, CF & SR
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Outline
MSS development
approaches
techniques for use in MSS
development
conventional development
techniques
Special MSS development
techniques
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MSS development
Need to consider normal IS issues such as:
Feasibility- economic, social,, technical
Project planning and control
Development approach and methodology
/techniques
Changeover
Support and maintenance
Post implementation review
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MSS Development Approaches
Traditional approach
Prototyping
Evolutionary prototyping vs. throwaway
prototyping
Evolutionary approach
Hybrid approach
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MSS Development Approaches
Traditional approach
Requirements specification
Design
implementation
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MSS Development Approaches
Prototyping within IS development
According to Skidmore and Wore, a prototype is:
“..alive working system and not just a paperbased design. Users can test its operations, and
explore its facilities and so do not have to rely
upon written description”
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MSS Development Approaches
The Hybrid approach
Both throwaway prototyping and evolutionary
prototyping can be employed at appropriate
stages of the traditional approach.
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Related to MSS functionality
Can develop MSS using either a
traditional approach,and evolutionary
approach or a hybrid approach
Situation circumstances determine
In general, suitability trend?:
1. Information handling support?
2. Passive support of decision making?
3. Active support of decision making
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Techniques for use in MSS
development
Techniques provide a structured
approach to performing one or
more development activities
 What technique, assess where it
might be applied to MSS
development-active support,
passive support, etc.
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“Conventional” Development
Techniques and MSS
Development
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Fact-Finding Techniques
Remembering the techniques:
–S . . . (for Sampling)
–Q . . . (for Questionnaires)
–I . . . (for Interviewing)
–R . . . (for Reading or Research)
–O . . . (for Observation)
Not
in order of importance, or sequence in the
project
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Conventional” Development
Techniques and MSS Development
Entity Relationship (E-R) modelling
Flow Charts
OO Analysis and design techniques
Data flow diagramming
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Special MSS Development Techniques
Keen’s Value Analysis
Sprague and Carlson’s ROMC
CSF/KPI Hierarchy Diagramming
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Special MSS Development Techniques
Structure situation analysis
Silver’s MSS description Language
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