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9 Cards in this Set

  • Front
  • Back
components
Aggregation of parts that make up a larger "object". These parts are irreducible, and can not be broken down any further
Interrelations
The function of one component ties it to the function of others within the system. Each component is working toward some purpose but a common one
Boundary
What separates a system from it's environment, in which the system lies within the boundary. The boundary establishes the limits of a system, separating it from other systems.
Purpose
Overall goal or function of a system. In structured system design, one rule is high cohesion: any system you cannot describe in a single phrase is actually more than one function
Environment
Anything outside the system boundary that influences the system. The environment is made up of important components that are out of our control.
Interfaces
Points at which the system meets its environment. Interfaces also exists between subsystems that eliminate outside access to private info and also control points of entry.
Constraints
limits to what a system can do as a result of external rules and relates or internal decisions. Some constraints are imposed inside the system, others are imposed by the environment
Input
a system takes input from its environment in order to function. This starts the cascade of a system
Outputs
what a system returns to its environment as a result of achieving its purpose. In information systems, you have inputs, processing and outputs of info resources. Outputs are the data or info result of the processing.