Decision Support System
Decision
support systems (DSS) are interactive software-based systems intended to help
managers in decision-making by accessing large volumes of information generated
from various related information systems involved in organizational business
processes, such as office automation system, transaction processing system,
etc.
DSS uses
the summary information, exceptions, patterns, and trends using the analytical
models. A decision support system helps in decision-making but does not
necessarily give a decision itself. The decision makers compile useful
information from raw data, documents, personal knowledge, and/or business
models to identify and solve problems and make decisions.
A decision
support system is that system which helps the management in taking the business
decisions.
It is a system
which allow human-machine interface whereby, the decision-maker possess control
throughout the decision-making process.
It has one
primary objective that is to provide the managers with the necessary
information for making intelligent decisions. This approach not only helps in
bringing decision-making information directly to the executives, but also goes
one step further than typical management information systems by allowing
decision-maker to interact with the computer.
In this way,
the computer is simply a tool, which helps the executives in evaluation of the
alternatives so that they may reach on an effective decision. The ability of an
individual to retail control over the decision-making process is not only
useful to solve well-structured problems but also helps in solving semi
structured and unstructured problems.
Thus, Decision
Support System (DSS) is a specialized MIS designed to support an executives’
skills at all stages of decision making i.e. problem identification, selecting
relevant data, picking the approach to be used in decision making and
evaluating the alternative courses of action.
A decision
support system must generate information in such a form that executives may
understand and at a time when such an information is needed and place the
information under the direct control of the executives. Thus, the DSS enables
the business executives to take the efficient, effective and economic
decisions.
Decision
making is an important part managing organizations successfully. Decision
support systems (DSS) is a computer-based software application system where the
business data is analysed in the form of information and presents it to the
user so that the user can take meaningful business decisions more easily. It is
intended to help managers in decision-making by accessing large volumes of
information produced from various related information systems involved in
organizational business processes, such as office automation system,
transaction processing system, etc.
DSS uses the
summary information, exceptions, patterns, and trends using the models
analytically. A decision support system helps in decision-making it doesn’t
mean that it does necessarily give a proper decision itself. The decision
makers or managers compile useful information from raw data, documents,
personal knowledge, and/or business models to identify and solve problems and
make right decisions.
Programmed
and Non-programmed Decisions
There are
two types of decisions - programmed and non-programmed decisions.
Programmed
decisions are basically automated processes, general routine
work, where −
·
These decisions have been taken several times.
·
These decisions follow some guidelines or rules.
For
example, selecting a reorder level for inventories, is a programmed decision.
Non-programmed
decisions occur in unusual and non-addressed situations, so
−
·
It would be a new decision.
·
There will not be any rules to follow.
·
These decisions are made based on the available
information.
·
These decisions are based on the manager's
discretion, instinct, perception and judgment.
For
example, investing in a new technology is a non-programmed decision.
Decision
support systems generally involve non-programmed decisions. Therefore, there
will be no exact report, content, or format for these systems. Reports are
generated on the fly.
Attributes
of a DSS
·
Adaptability and flexibility
·
High level of Interactivity
·
Ease of use
·
Efficiency and effectiveness
·
Complete control by decision-makers
·
Ease of development
·
Extendibility
·
Support for modelling and analysis
·
Support for data access
·
Standalone, integrated, and Web-based
Characteristics
of a DSS
·
Support for decision-makers in semi-structured and
unstructured problems.
·
Support for managers at various managerial levels,
ranging from top executive to line managers.
·
Support for individuals and groups. Less structured
problems often requires the involvement of several individuals from different
departments and organization level.
·
Support for interdependent or sequential decisions.
·
Support for intelligence, design, choice, and
implementation.
·
Support for variety of decision processes and
styles.
·
DSSs are adaptive over time.
Features of Decision Support System:
(a) It is a
way to organize information intended for use in decision-making. It envelope
the use of a database for a specific decision making process. A decision
support system does not automate transformation performed on data nor simply
provide output in the form of report rather it supports the decision makers
problem solving approach.
(b) A DSS
allow the decision-maker to interact in a natural manner due to the careful
design of the user interface.
(c) Decision
support systems are designed to help support decisions that are formulated as
semi structured, complex problem. These problems remain resistant to complete
computerization.
(d) A DSS may
be constructed to support one-time decision, those that are infrequent;
however, the type of problem or opportunity best addressed through use of a DSS
is one that requires human judgment.
(e) A decision
support system is typically designed for either a particular decision-maker or
a group of decision-makers. This allows the system designer to customize
important system features to adapt to the type of representations.
(f) Rather
than building a specific DSS from scratch, a system analyst can use a package
of interrelated hardware and software called a DSS generator.
(g) A decision
support system is best conceptualized as a process instead of a product.