What are abstract or physical systems, open or closed systems, MIS, decision support system?

Answer 1

System (from the Latin (systēma), and this from the Greek σύστημα (sustēma)) is an assemblage of entities/objects, real or abstract, comprising a whole with each every component/element interacting or related to another one. Any object which has no relationship with any other element of the system is not a component of that system. A subsystem is then a set of elements which is a a system itself and a part of the whole system.

Abstract Systems: Every conceptual model is an abstract system, for example, traffic system models and computer programs are both types of modeled systems. They can be the product of identification, design or invention.

Physical systems or thermodynamic systems are systems based only on matter and energy. The elements (or components) of a physical system interface enable the 'flow' of information, matter and energy.

An open system has a discrete number of interfaces to allow the exchange of matter, energy or information with its surrounding environment. Therefore, a system may be said to be any assemblage which accepts an input, processes it, and produces an output. (see Information Processor) That is, an open system has an external interface in which matter, energy, information goes from outside to one or more internal element(s), which transduces this input via the original or other element(s) (e.g., by passing it among internal elements via internal interfaces), and an external interface through which results flow from some one or more internal element(s) to outside the system.

A closed system is self-contained in such a way that outside events have no influence upon the system. In this case there is no possible exchange of matter, energy or information with the surrouding environment. After a period of time all internal activity within a closed system will stop.

Management information system (Abbr. MIS): A computer system designed to help managers plan and direct business and organizational operations.

Decision Support Systems (DSS) are a specific class of computerized information system that supports business and organizational decision-making activities. A properly designed DSS is an interactive software-based system intended to help decision makers compile useful information from raw data, documents, personal knowledge, and/or business models to identify and solve problems and make decisions.


Typical information that a decision support application might gather and present would be:
Accessing all of your current information assets, including legacy and relational data sources, cubes, data warehouses, and data marts
Comparative sales figures between one week and the next
Projected revenue figures based on new product sales assumptions
The consequences of different decision alternatives, given past experience in a context that is described


Hope all of above is helpful.

Thanks.

Answer 2

Abstract System Definition

Answer 3

thanks alot
i found it very useful