The development Process: Life Cycle versus Prototyping
DSS construction can be differentiating between two extremes.
1. The life cycle approach
2. The evolutionary prototyping approach (iterative process)
The system development life cycle (SDLC) approach and DSS
This approach is used in transaction processing systems, which are
fairly structured.
The evolutionary prototyping approach
The prototyping approach aims at building a DSS in a series of short
steps with immediate feedback from users to ensure that development
is preceding correctly therefore, DSS tools must permit changes to be
made quickly and easily.
Advantages of prototyping
Short development time
Short user reaction time – feedback from user
Improved user understanding of the system, its information needs, and
its capabilities
Low cost
Disadvantages and limitations
Selection of DSS Development Tools
Mainframe DSS software The selection of a DSS generator
PC DSS software Developing DSS
Software selection
Mainframes DSS Software
Mainframe DSS software costs between $30,000 and $300,000 and
has several powerful capabilities.
Example _ Metafact (From integrated data architects, Northridge, (CA)
costs over $200,000.
PC DSS Software
Several vendors offer PC versions of their mainframe products at a
considerably low price.
Software selection
At the time of the selection, DSS information requirements and outputs
are not completely known.
There are hundreds of software packages on the market.
The software packages are changing very rapidly.
Price changes are frequent.
Several people may be involved in the evaluation team
Technical, functional, end user and managerial issues are all
considered.
Developing DSS
Development tools increase the productivity of builders and help them
produce, at a moderate cost, a DSS responsive to the true needs of
users.
A DSS development system can be thought of as s shop with several
tools and components and these components are integrated into a
DSS generator.
DSS construction can be differentiating between two extremes.
1. The life cycle approach
2. The evolutionary prototyping approach (iterative process)
The system development life cycle (SDLC) approach and DSS
This approach is used in transaction processing systems, which are
fairly structured.
The evolutionary prototyping approach
The prototyping approach aims at building a DSS in a series of short
steps with immediate feedback from users to ensure that development
is preceding correctly therefore, DSS tools must permit changes to be
made quickly and easily.
Advantages of prototyping
Short development time
Short user reaction time – feedback from user
Improved user understanding of the system, its information needs, and
its capabilities
Low cost
Disadvantages and limitations
Selection of DSS Development Tools
Mainframe DSS software The selection of a DSS generator
PC DSS software Developing DSS
Software selection
Mainframes DSS Software
Mainframe DSS software costs between $30,000 and $300,000 and
has several powerful capabilities.
Example _ Metafact (From integrated data architects, Northridge, (CA)
costs over $200,000.
PC DSS Software
Several vendors offer PC versions of their mainframe products at a
considerably low price.
Software selection
At the time of the selection, DSS information requirements and outputs
are not completely known.
There are hundreds of software packages on the market.
The software packages are changing very rapidly.
Price changes are frequent.
Several people may be involved in the evaluation team
Technical, functional, end user and managerial issues are all
considered.
Developing DSS
Development tools increase the productivity of builders and help them
produce, at a moderate cost, a DSS responsive to the true needs of
users.
A DSS development system can be thought of as s shop with several
tools and components and these components are integrated into a
DSS generator.
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