Data Processing

F.4 C.I.T. Data Processing

Data Processing Cycle 

Find the maximum, minimum and mean height of each class in your school  How

will you carry out the task?  Try to describe it step by step

Data Processing Cycle 

Find the maximum, minimum and mean height of each class in your school  Will

you carry out a survey? Interview? Questionnaire? 

Data Collection

 What

will you do then? Group the questionnaires by class? Then sort? 

Data Preparation

 Input to the computer  Data Input  Analyzed by the computer  Data Processing  Produce the result  Information Output

Data Processing Cycle Data Input

Information Process

Output

Information = Analyzed / Processed Data = Data + Meaning

Data Processing Cycle Data

Information

Source Document

Data Collection • • • •

Questionnaire Interview Research ……

Data Preparation • • • •

Grouping Sorting Checking ……

Data Input • Checking

Data Processing

Information Output • Analyzed results • Error report

Processing Modes 

Batch processing vs Real-time processing  Batch 

Processing

Time lag between data collection and processing

Process

Processing Modes 

Batch processing vs Real-time processing  Real-time 

Processing

Data is being processed immediately when it is collected

Process

Processing Mode Batch Processing

Real-time Processing

Properties

Data

are processed in batch Time lag between data collection and processing Output may be outdated Cheaper Slower Offline

Data

Example

Payroll

Ticket

system School report printing

is processed on-by-one No or short delay between data collection and processing Output is up-to-date More expensive Very fast Online booking system Online game