Types of information
system
For most businesses, there
are a variety of requirements for information. Senior managers need information
to help with their business planning. Middle management need more detailed
information to help them monitor and control business activities. Employees
with operational roles need information to help them carry out their duties.
As a result, businesses
tend to have several "information systems" operating at the same
time. This revision note highlights the main categories of information system
and provides some examples to help you distinguish between them.
The main kinds of
information systems in business are described briefly below:
Information
System |
Description
|
Executive Support Systems
|
An Executive
Support System ("ESS") is designed to help senior management make strategic decisions.
It gathers, analyses and summarises the key internal and external information
used in the business.
A good way to
think about an ESS is to imagine the senior management team in an aircraft
cockpit - with the instrument panel showing them the status of all the key
business activities. ESS typically involve lots of data analysis and
modelling tools such as "what-if" analysis to help strategic
decision-making.
|
Management Information Systems
|
A management
information system ("MIS") is mainly concerned with internal sources of information. MIS
usually take data from the transaction processing systems (see below) and
summarise it into a series of management reports.
MIS reports tend
to be used by middle management and operational supervisors.
|
Decision-Support Systems
|
Decision-support
systems ("DSS") are specifically designed to help management make
decisions in situations where there is uncertainty about the possible
outcomes of those decisions. DSS comprise tools and techniques to help gather
relevant information and analyse the options and alternatives. DSS often
involves use of complex spreadsheet and databases to create
"what-if" models.
|
Knowledge Management Systems
|
Knowledge
Management Systems ("KMS") exist to help businesses create and
share information. These are typically used in a business where employees
create new knowledge and expertise - which can then be shared by other people
in the organisation to create further commercial opportunities. Good examples
include firms of lawyers, accountants and management consultants.
KMS are built
around systems which allow efficient categorisation and distribution of
knowledge. For example, the knowledge itself might be contained in word
processing documents, spreadsheets, PowerPoint presentations. internet pages
or whatever. To share the knowledge, a KMS would use group collaboration
systems such as an intranet.
|
Transaction Processing Systems
|
As the name
implies, Transaction Processing Systems ("TPS") are designed to
process routine transactions efficiently and accurately. A business will have
several (sometimes many) TPS; for example:
- Billing systems
to send invoices to customers
- Systems to calculate the weekly and monthly payroll and tax payments - Production and purchasing systems to calculate raw material requirements - Stock control systems to process all movements into, within and out of the business |
Office Automation Systems
|
Office Automation
Systems are systems that try to improve the productivity of employees who
need to process data and information. Perhaps the best example is the wide
range of software systems that exist to improve the productivity of employees
working in an office (e.g. Microsoft Office XP) or systems that allow
employees to work from home or whilst on the move.
|