SU 1 Data and the Computerized information system process Flashcards
Computerised Information system (CIS) Process
Activities - Input of data - (Store raw data and information) - Processing - Output/Information - (Store raw data and information) - Making decisions
Raw data
Data captured on manual documents or data entered in the CIS and not yet processed.
Information
Obtained by processing raw data = Processed data
Source document
First documented record of an activity that took place
Input types
- Batch input
* Online input
Batch Input
Similar source documents being grouped together (batch) and entered in the CIS periodically (daily, weekly, monthly)
Online input
Data being captured immediately into the CIS at the point where the activity occurs
Processing methods
- Classifying data
- Performing calculations
- Sorting data
- Summarizing data
- Transforming data
Classifying data
Data is arranged into different groups (catagories)
Performing calculations
Arithmetical or logical calculations can be performed on data.
Sorting data
Data is organised (sorted) in an orderly sequence based on specific criteria.
Summarising data
condenses the data by extracting only specific data based on criteria provided
Transforming data
Transforming the format or medium of the original data into another format or medium.
Processing types
- Batch processing
* Real- time processing
Batch processing
When transaction files are updated to the master files periodically (daily, weekly or monthly)
Real-time processing
Immediate update of the transaction files to the master files as the transaction occurs.
Output types
- Batch output
* Interactive output
Batch output
All requests for information are batched together and periodically extracted
Interactive output
Users are directly connected to the CIS and can request certain information and receive it immediately
Typical processing systems
- Batch input, batch processing and batch output
- Batch input, batch processing and interactive output
- Online input, batch processing and interactive output
- Online input, real-time processing and interactive input
Batch processing
When transaction files are updated to the master files periodically (daily, weekly or monthly)
Real-time processing
Immediate update of the transaction files to the master files as the transaction occurs.
Output types
- Batch output
* Interactive output
Batch output
All requests for information are batched together and periodically extracted
Interactive output
Users are directly connected to the CIS and can request certain information and receive it immediately
Typical processing systems
- Batch input, batch processing and batch output
- Batch input, batch processing and interactive output
- Online input, batch processing and interactive output
- Online input, real-time processing and interactive input