Explains basic concepts of System Development Life Cycle(SDLC) and Prototyping in Decision Support System(DSS).

1. DSS Construction:
Development Process

2. System Development Life Cycle
 As new and emerging technologies become
essential for survival in an increasingly global
economy, organizational change becomes a
necessity.
 SDLC is a systemic method for organizations to
successfully implement change.

3. What is SDLC?
 According to Dennis, Wixom, and Tegarden, “The SDLC is
the process of understanding how an information system
can support business needs by designing a system,
building it, and delivering it to users”
 A systemic strategy for large-scale development projects.
 A Conceptual model that guides in information system
development.

4. Phases in SDLC
 SDLC consists of four phases to develop information
system:
Planning
Analysis
Design
Implementation

5. Planning
 Do a feasibility study and look at options.
 Economical (Can we afford to do this? Will it benefit our
organization?)
 Organizational and Operational (Will they use it? Do they need
it?)
 Technical (Can we build it? Do we have the technology to
support it?)
 Create a project plan.
 A plan will keep the project on track
 A plan can be used for evaluation .

6. Analysis
 Analyze by breaking down into parts (draw a
diagram).
 Gather requirements by talking to all stakeholders
and technical providers.
 Create a proposal to present to stakeholders.

7. Design
 Decide if the system will be created in house or out sourced.
 Identify how it will operate and how it will be used by the end
users.
 Reexamine the feasibility study done in the Analysis Phase.

8. Implementation
 The system is built or purchased and tested.
 Training is implemented for end users.
 A technical support plan is put into place.
 Use by end users is evaluated.

9. Maintenance and Support
 Include all activities that are required once the
system in in place.
 Phone Support for Users.
 Physical onsite user support.
 Resolving any issue that may arise with the new
system.
 Providing support materials and tools for users.

10. Prototyping
 Also known as iterative design or evolutionary
development.
 Aims at building a DSS in a series of short steps.
 Involves immediate feedback from users.

11. Prototyping
 Performs analysis, design, and implementation
phases concurrently and repeatedly.
 Users see system functionality quickly, and provide
feedback.
 Decision makers learn about the problem.

12. Prototyping
prototype NOT Ok
NEED
Planning
Analysis
Design
Implementation
Prototyping
System

13. Advantages of prototyping
 Users and managers are involved in every phase and
iteration.
 Learning is explicitly integrated into the design process.
 Improved user understanding.
 Prototyping bypasses the information requirement definition.
 Short development time
 Low Cost