System Properties Viewpoint

This viewpoint provides the instructions to create the System Properties View in a System Description.

The view identifies the various types of system properties for the system-of-interest. Some of these are:

System Properties

• Quantity - generally the sum of the properties of the system elements (parts)
  Note that these quantities may place constraints or limitations on the system.

Systemic Properties:

• are properties of the whole not found in any of the system elements or parts.
• are created through the interaction of the system elements, the environment, and other systems.
• may emerge as unexpected properties through the operation of the system. These may be desired or undesired.

Examples of systemic properties are:

• Qualities that generally emerge but are not easily measured.
• Measurable variables
• Functions or Capabilities
• States

The system properties are key to understanding the value of a system-of-interest. The value is created in line with the overall system purpose. These generally provide the benefits delivered to the environment.

These properties also establish the constraints and limitations of the system in its environment.

The following models show the system properties and their relationship to the environment and other systems:

• Conceptual Models (Class Diagrams).
• Property Description (PropDesc)
• System Functional or Capability Models (Class Diagrams or Use Case Diagrams)
• State Machine Diagrams (System State Transitions)

• Where appropriate, create a property Description for each property.
• Identify the models to create (CLD or CM)
• Review the models.

• Identify and rules or constraints that must be followed to complete this view

State any references or people that have helped to define this viewpoint.

Provide notes and background information to track any changes or other information.