The document discusses the detailed design phase of a system development project. It describes modularization as dividing a system into separate functional subsystems or modules to speed up development and allow flexibility. Advantages of modularization include eliminating duplication and allowing separate testing, but changes can affect common modules. Input design focuses on converting user data to a computer format easily, logically, and without errors using various input media and methods. Output design serves to present the right information to the right people on time through reports, and using appropriate media and formats.

1. Detailed Design

2. Introduction
• The design translates the system
requirements into ways of operate them.
• The design is a solution, a “ how to “
approach, compared to analysis, a “what is”
orientation.
• The design phase focuses on the detailed
implementation of the system recommended
in the feasibility study.

3. Modularization
• One way to plan a new system is to focus on
each functional subsystem as a separate
entity or application area.
• Using such an approach, each application area
is treated as if it were totally independent.
• The modular systems approach divides each
application area into a number of smaller
units called modules.

4. Advantages Of
Modularization
• speed up the systems process.
• eliminates unnecessary duplication.
• result in higher quality.
• provides better control over the total system
project.
• allows flexibility as additional features may be
added later.
• parts of the system can be tested separately.

5. limitations Of
Modularization
• Modular systems design is best viewed as one
aspect of a broader planning issue, but it is
not a required step in the design process.
• changes and errors affect common modules,
the negative consequences can be
widespread

6. Input Design
• Inaccurate input data are the most common
cause of error in data processing.
• Errors entered by operator can be controlled
by input design.
• Input design is the process of converting user-
originated inputs to a computer based format.

7. Goal of input design
• The goal of designing input data is to make
data entry:-
• Easy
• Logical
• Error free.

8. Input media and devices
• Keyboard
• Mouse
• Touch Screen
• Sound and speech
• Automatic data capture
• Optical mark recognition (OMR)
• Bar codes
• Optical character recognition (OCR)
• Magnetic Ink

9. Data input methods
• ON-LINE - User directly Enters data using
screen prompts.
• OFF-LINE -Forms filled by users- for example-
candidates for admission to a college fill forms

10. DATA OUTPUT DESIGN
• Outputs present information to system users.
• Outputs, the most visible component of a
working information system, are the
justification for the system.
• During systems analysis, you defined output
needs and requirements, but you didn't
design those outputs.

11. Output-design Objectives
• Serve the intended purpose
• Deliver the right quantity of output
• Deliver it to the right place
• Provide output on time

12. Outputs Reports
• Detailed Reports:
• Present information with little or no filtering or
restrictions.
• Some detailed reports are historical in nature.
• Exception Reports:
• Filter data before it is presented to the manager
as information.
• Exception reports only report exceptions to some
condition or standard.

13. Types of Outputs
• Internal outputs
It stay inside the system to support the system's
users and managers
• External outputs
It leave the system to trigger actions on the
part of their recipients or confirm actions to
their recipients

14. Output Media
• Paper
• Screen
• Microfilm
• Video/Audio
• CDROM, DVD
• Other electronic media

15. Output Formats
• Tabular output
• Zoned output
• Graphic output
• Narrative output