1. 1
Collecting your data
Chapter no 6

2. 2
Form design
 Design of form is very important as most of
information from forms will be placed on
computer system
 Relevant information is included
 For good design of form following information
are needed
 Who will be using the form ?
 Headings
 Instructions
 Layouts
 Sections
 Testing

3. 3
Coding data
 Codes are used to represent information
 There are following reasons for using
codes
 Are quicker to type
 Reduces the size of files
 Increased the speed of searching
 Codes are often be unique

4. 4
Designing codes
 There are certain points are remember for
designing a coding system
 Codes should have same length
 Codes must be easy to use
 Codes must not be too short

5. 5
Data Capture ( Putting detail into
computer
 Getting the information into a structure in which
it can be processed by the computer is called
data capture.
 Method
1. Key to disk is suited for small amount of data
,in this typing is involve and there is much error
in code and takes lot of time to put information
by keyboard
2. Automatic reading data from the form

6. 6
Methods
 Magnetic ink character recognition (MICR)
 Optical Mark reader (OMR)
 Bar code Reader (BCR)
 Optical character Recognition (OCR)
 Speech recognition

7. 7
Examples of automatic data
Flood Warning
 It is not feasible for a river’s water level to be
constantly monitored by human staff.
 Instead sensors are used to measure the water
level
 Radio links sends the data from the sensors to
the main computer and if there is danger of
flooding
 So in this way emergency services can be
altered and flood warning issued.

8. 8
Automatic data capture using
signals
 Not all data to be entered using a keyboard or special
forms.
 Some data can be entered directly into a computer in the
form of electronic signals
 This data comes from sensors detects which produce
signals that depends on physical quantities.
 Examples: components passing along a production line
could break the light beam as they pass
 The traffic flow along a certain road is measured by
pressure sensors which records a pulse every time a
vehicle passes over them.

9. 9
Remote Sensing
 Sensing at a distance
 Electronic signals from remote sensors can be
sent through telephone wires
 Such a system is ideal for remote weather
stations which send the data to a central
computer
 Example: to detect when a river is likely to burst
its banks, river authorities also use sensors to
monitor the water quality to our rivers and to give
pollution alert.