FINAL EXAM (M1S1) PART 2 Flashcards
input is also modified to enable the “__________” to handle information
Processor
this means that as the output specification change so does the?
Processing
it guides the system.
Control
it is the decision making subsystem that “___________” the pattern of activities governing input, processing and output.
Control
measures output against a standard in some form of cybernetic procedure that includes communication and control.
Feedback
reinforces the performance of the system.
Positive Feedback
generally provides the controller with information for action.
Negative Feedback
is the “suprasystem” within which an organization operates. it is the source of external elements that impinge on the system.
Environment
it often determines how a system must function.
Environment
the limits that identify its components, processes and interrelationship when it interfaces with another system.
Boundaries
each system has “__________” that determine its sphere of influence and control
Boundaries
Types of System
- Physical or Abstract
- Open or Close
- Man Made information system
are tangible entities that may be static or dynamic in operation.
Physical Systems
a programmed computer is a?
Dynamic System?
are non-physical entities or conceptual that may be formulas, representation or model of a real system.
Abstract System
has many interfaces with its environment. it permits interaction across its boundary. it receives input and delivers output to the outside.
Open System
isolated from environmental influences;
Close System
Characteristics of Open System:
- Input from outside
- Entropy
- Process, output and cycles
- Differentiation
- Equi-Finality
Open system are self adjusting and self regulating
Input from Outside
all dynamic system tent to run down overtime, resulting in “___________” or loss of energy.
Entropy
Open Systems produce “________________” following a continuous path.
Process, Output and cycles
Open system have a tendency toward an increasing specialization of functions and a greater “____________” of their components.
Differentiation
the terms are implied the goals are achieved through differing courses of action and a variety of paths.
Equi-Finality
is the basis for interaction between user and the analyst. it provides instructions, commands and feedback.
Information System
it determines the nature of relationships among decision-makers. it may be viewed as a decision center for personnel at all levels.
Information system.
may be defines as set of devices, procedures and operating systems designed around user-based criteria to produce information and communicate it to the user for planning, control and performance.
Information System
is based on the organization represented by the organization chart (Authority).
Formal Information system
are used to show the benefits of abstracting complex system to model form.
System Models
The analyst begins by modeling this reality before
considering the functions that the system is to perform;
System Model
System Models:
- Schematic
- Flow
- Dynamic
- Static
