List four stages involved in the data processing cycle (3 mks)
Stages of data processing cycle
i) Data Collection
Data collection is the act of collecting data from its point of origin to the computer in a form suitable for processing
Stages of Data Collection
Data collection is procedural, thus it attracts the following stages
A) Data Creation
Data creation is the process of capturing data from the source location using data capturing methods like:(scanning, digital camera, touch screen, voice input etc).
B) Data Transmission
This is a term used to refer to the transfer of data from the point of collection (source) to the point where processing is to be done (data processing department) this is possible through computer-to-computer communication, physically by post office or via courier services if the source is away from the data processing department.
C) Data Preparation
Data preparation is the term used to describe the process by which data is prepared and made ready for entry in the computer for processing.
ii) Data input
This is the process where the collected data is converted from human readable form into machine readable form (binary form)
To ensure quick and error free data the following features should be considered:
Validation - this is the counter checking whether what is on the input document is exactly what is entered into the computer
Media Conversion - this is the act of converting data from different storage medium e.g from a flash disk to a hard disk
Sorting - Data should be arranged in a predefined order before being processed
This is the manipulation of input data into a more meaningful output that can be regarded as being meaningful to the user. Processing involves arithmetic, sorting and logical operations
This is the final activity in data processing cycle where the expected output (information) is displayed. This information is then distributed to places (information dissemination) where its needed to influence decision making process.
Information dissemination may include: electronic presentations over radio or television, distribution of hard copies, broadcasting messages over the internet or mobile phones.