sysml-roadmap:secm_concept_definitions_snapshot_1_28_2016
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| ====SECM Concept Model Definitions Snapshot (1/28/2016)==== | ====SECM Concept Model Definitions Snapshot (1/28/2016)==== | ||
| ---- | ---- | ||
| + | ^Name ^Documentation ^ | ||
| + | |Action | A non-interruptible function. Note: An action represents an atomic unit of processing or work. Actions may be continuous or discrete. Discrete actions may or may not be assumed to execute in zero time.| | ||
| + | |Activation/deactivation event|An event that occurs when a function is activated or deactivated.| | ||
| + | |Activation/deactivation requirement|The activation or deactivation that one or more functions must satsify when specified events and conditions occur.| | ||
| + | |Activation/deactivation rules|The logic which determines when one or more functions are activated and deactivated.| | ||
| + | |Activation time|The interval of time that a function or state is active.| | ||
| + | |Activity|One or more related actions.| | ||
| + | |Analysis|The process of evaluating elements, properties and associated relationships.| | ||
| + | |Analysis model|A model used to analyze the structure, behavior, and/or properties of systems and environments.| | ||
| + | |AP-233 |ISO STEP Application Protocol for Systems Engineering Data Interchange Standard| | ||
| + | |Arc |An association between two or more nodes.| | ||
| + | |Association |Refer to UML specification| | ||
| + | |Behavior|The activation/deactivation of one or more functions. Note: This describes how a system interacts with its environment. Reactive behavior includes the stimulus and response.| | ||
| + | |Behavior allocation|The allocation of functions and/or states to systems, and the allocation of inputs and outputs to system ports.| | ||
| + | |Boolean|Refer to UML specification| | ||
| + | |Category|A partitioning of elements based on a classification.| | ||
| + | |Complex number|A number which can includes a real and imaginary part.| | ||
| + | |Component|A constituent part of an element or system that contributes to the properties and behaviors of the whole (emergent). Note: A leaf component does not have constituent parts.| | ||
| + | |Composite function|A function which is decomposed into lower level functions.| | ||
| + | |Composite state|A state which includes nested states.| | ||
| + | |Concurrent state|A state which is active at the same time as another state that is part of the same composite state.| | ||
| + | |Condition|An expression with a discrete output, which is true as long as the expression evaluates true, and is false otherwise.| | ||
| + | |Connecting component|A specialized component or system, whose primary function is to connect the outputs from one system to the inputs of another system via its ports. Note: This may be a wire, network, or mechanical coupler that has properties and behaviors, which may transform the inputs and outputs.| | ||
| + | |Connection|Identification of which ports connect to one another.| | ||
| + | |Connection path|Multiple connections that may represent a single logical connection.| | ||
| + | |Continuous time model|A model which is based on properities that vary continuously with time.| | ||
| + | |Control input|An input that activates or deactivates a function.| | ||
| + | |Control operator|A specialized function that provides logic to transform input events and conditions to discrete values that are supplied as control inputs to functions.| | ||
| + | |Data|A component of information.| | ||
| + | |Data type|Refer to UML specification| | ||
| + | |Decomposition|A description of a whole in terms of its component parts.| | ||
| + | |Dependency|A relationship where a change to one entity results in a change to the other.| | ||
| + | |Deployment|A allocation of one component to another that is often associated with the utilization of resources across the distributed nodes of a system.| | ||
| + | |Design|The process of transforming requirements to an implementation.| | ||
| + | |Design constraint|A requirement that one or more components of a system must satisfy. Note: This term is sometimes used to refer to a constraint on the design process versus the system.| | ||
| + | |Diagram interchange|The ability to exchange notational information on a diagram, including the layout of the diagram.| | ||
| + | |Discrete time model|A model which is based on properities that vary discretely with time.| | ||
| + | |Domain|A scope that encompasses a set of entities and relationships that may be addressed by the model.| | ||
| + | |Effectiveness measure|A criterion for system optimization that is critcial to the success of the mission. Note: The criterion are often used to support trade studies to select among alternatives, as well as to optimize a given design.| | ||
| + | |EIA 632|A process standard for Engineering a System.| | ||
| + | |Element|Anything of interest to the modeler, which is uniquely identifiable and can be characterized by a set of properties.| | ||
| + | |Enabling system|Any system which may be needed to support another system throughout its life cycle, and typically includes the development, production, deployment, support, and disposal systems.| | ||
| + | |Enumerated value|Refer to UML specification| | ||
| + | |Environment|A collection of systems and elements that interact either directly or indirectly with the system of interest.| | ||
| + | |Event|A noteworthy occurrence that occurs at the instant of time when a specified expression evaluates true.| | ||
| + | |Execution|The state of the system or model when it is running. For a model, this implies that model computation is occuring.| | ||
| + | |Expression|Refer to UML specification| | ||
| + | |Facility|A physical infrastructure that supports use of equipment and other resources.| | ||
| + | |Failure|An inability to satsify a requirement.| | ||
| + | |Fork|A control operator which enables all of its outputs, when the input is evaluated true.| | ||
| + | |Function|A transformation of inputs to outputs that may include the creation, monitoring, modification or destruction of elements, or a null transformation.| | ||
| + | |Function port|A binding of an input to the arguments of a function.| | ||
| + | |Function time-line|A representation of the interval of time that one or more functions and/or states are active and inactive.| | ||
| + | |Functional requirement|A function a system must perform.| | ||
| + | |Generalization|The factoring of common features to characterize a more general concept.| | ||
| + | |Geometric model|A model of the geometric relationships associated with one or more elements.| | ||
| + | |Hardware|A component of a system that has geometric contstraints.| | ||
| + | |IDEF0|Air Force Standard for process modeling.| | ||
| + | |Input/Output|An element that is subject to a transformation by a function.| | ||
| + | |Instance|A unique model element in a set that iis defined by the general features of its classifier.| | ||
| + | |Integer|A whole number| | ||
| + | |Interaction|Emergent behavior that results from two or more dependent behaviors Note: A system or component interacts with other components its environment, to yield an emergent system behavior from the individual component behaviors .| | ||
| + | |Interface|The inputs, outputs, ports, connections, connecting components (i.e. harness), and associated information that support one or more interactions between systems. Note: The UML definition of interface also includes the operations that must be performed in response to the inputs or invocations.| | ||
| + | |Interface requirement|An interface a system must support.| | ||
| + | |ISO 15288|A process standard for system life cycle processes.| | ||
| + | |Issue (technical)|A potential problem, that requires resolution.| | ||
| + | |Iteration loop|A specialized loop where the loop repeats a specified number of times.| | ||
| + | |Join|A control operator which enables its control output, when all of its inputs are evaluated true.| | ||
| + | |Leaf function|A function which is not further decomposed.| | ||
| + | |Loop|A control operator which initiates one or more loop functions when the input is evaluated true, and is repeated as long as the loop conditions are evaluated true.| | ||
| + | |Manual procedure|A set of operations that provide instructions for a user to perform.| | ||
| + | |Mean|The expected value associated with a probability distirbution.| | ||
| + | |Merge|A control operator which enables its output, when any of its inputs are evaluated true.| | ||
| + | |Mission|The operational context and purpose that the system is intended to support.| | ||
| + | |Model (graphical, visual)|A representation of something of interest that includes notation and semantics.| | ||
| + | |Model element|A construct that is used to build a model.| | ||
| + | |Model interchange|The ability to exchange model information.| | ||
| + | |Model view|A subset of model elements and associated relationships, that are of use to the modeler for a particular purpose and context.| | ||
| + | |Natural object|An element that is not engineered, and may be part of a system or environment.| | ||
| + | |Need|A desired requirement of a stakeholder.| | ||
| + | |Nested state|A state which is enabled by its composite state.| | ||
| + | |Node|A component of a system that provides resources to support execution.| | ||
| + | |Notation|The graphical depiction of a model construct.| | ||
| + | |Operational requirement|A requirement which is associated with the operation of a system, and typically includes a combination of functional, interface, and performance requirements.| | ||
| + | |Parametric model|An analysis model which defines a set of dependent or logically grouped parametric relationships.| | ||
| + | |Parametric relationship|A dependency between properties, such that a change to the value of one property impacts the value of the other property.| | ||
| + | |Performance property|A measure of the transformation or response of a function or behavior (i.e response time, etc).| | ||
| + | |Performance requirement|A performance property a system must satsify.| | ||
| + | |Physical property|A physical characteristic of a system or element (i.e. weight, color).| | ||
| + | |Physical requirement|A physical property a system must satsify.| | ||
| + | |Port|The part of a system or component that provides access between a system’s behaviors and properties, and its environment. Note: this is sometimes referred to as an interaction point.| | ||
| + | |Probability distribution|A mathematical function which defines the likelihood of a paritcular set of outcomes.| | ||
| + | |Probe|A component that monitors the values associated with one or more parameters (i.e. properties).| | ||
| + | |Problem|A deficiency, limitation, or failure to satisfy a requirement or need, or other undesired outcome. Note: A problem may be associated with the behavior, structure, and/or properties of a system or element at any level of the hierarchy (i.e. system of system level, down to a component/part level).| | ||
| + | |Problem cause|The relationship between a problem and its source problems (i.e. cause). Note: This cause affect relationship is often represented in fishbone diagrams, fault trees, etc.| | ||
| + | |Process|A set of inter-related functions and their corresponding inputs and outputs, which are activated and deactivated by their control inputs.| | ||
| + | |Property|A quantifiable characteristic.| | ||
| + | |Property association|The assignment of a property to a model element or set of model elements.| | ||
| + | |Property attribute| | ||
| + | |Property value|Unique state of a property.| | ||
| + | |Real number|A number which can have any value from negative infinity to infinity.| | ||
| + | |Replicate function|A function which represents the same transformation, but is implemented by separate resources.| | ||
| + | |Requirement|The capability, behavior, structure, and/or properties that a system, component, or element must satisfy. Note: This is used to establish a contract between the customer (or stakeholder) and implementer.| | ||
| + | |Requirement allocation|The assignment of a requirement to an element, component, or system.| | ||
| + | |Requirement attribute|An attrirbue fo a requirement, which may include its criticality or weighting, level of uncertainty, verification status, etc.| | ||
| + | |Requirement traceability|The relationship between a source requirement and the derived requirements needed to satisfy the source requirement.| | ||
| + | |Requirement type|A category of requirement. Note: This includes functional, interface, performance, etc.| | ||
| + | |Requirement verification|A comparison between a requirement and the verification results that is intended to satisfy the requirement.| | ||
| + | |Resource|Any element that is needed for the execution of a function.| | ||
| + | |Role|Refer to System role | ||
| + | |Scalable|A measure of the extent to which the modeling langauge (or methodology, etc), can be adapted to an increase in scope and/or complexity.| | ||
| + | |Selection|A control operator which represents a test that enables an output based on the values/conditions of the input.| | ||
| + | |Semantics|The meaning of a model element. Note: a precise meaning should be able to be expressed mathematically.| | ||
| + | |Sequential state|A state which can only be active when the other sequential states are not active.| | ||
| + | |Simple state|A state that does not have nested states.| | ||
| + | |Software|A component of a system that specifies instructions which are executed by a computer.| | ||
| + | |Source requirement|The requirement which is the basis for deriving one or more other requirements.| | ||
| + | |Spatial representation|A geometrical relationship among elements.| | ||
| + | |Specialization|A classification of an entity (e.g., element, system, function, requirement, ...), which specifies the common features of the more general element, and unique features of the specific element.| | ||
| + | |Specialized requirement|A requirement that is not explicitly addressed by the default requirement types. Note: This may include safety, reliabillity, maittianability, producibility, usability, security, etc.| | ||
| + | |Specialty engineering|A general term for engineering disciplines associated with some specific aspects of a system, suchas reliability or safety engineering.| | ||
| + | |Specification|One or more requirements for a system, component or element.| | ||
| + | |Stakeholder|Individuals, groups, and/or institutions which may be impacted by the system throughout its life cycle, including acquisition, development, production, deployment, operations, support, and disposal.| | ||
| + | |State (finite)|A condition of a system or element, as defined by some of its properties, which can enable system behaviors and/or structure to occur. Note: The enabled behavior may include no actions, such as associated with a wait state. Also, the condition that defines the state may be dependent on one or more previous states.| | ||
| + | |State based behavior|Behavior which is described by states and transitions between states.| | ||
| + | |Storage device|A component of a system that is used to store a system store. Note: this may include memory device, a battery, or a tank.| | ||
| + | |Store requirement|An element a system must store.| | ||
| + | |String|A value represented by alphanumeric characters.| | ||
| + | |Structure|The relationships between the components that contribute to the properties of the whole, and enable them to interact (inter-relate).| | ||
| + | |Subsystem|A logical or physical partitioning of a system.| | ||
| + | |System|An element, with structure, that exhibits observable properties and behaviors.| | ||
| + | |System (component) boundary|The set of all ports, which connect the system (component) to its environment.| | ||
| + | |System context|A depiction of the inputs and outputs between a system and its environment.| | ||
| + | |System hierarchy|A decomposition of a system and its components.| | ||
| + | |System interconnection|The connection between systems and between components.| | ||
| + | |System role|A subset of its behaviors, properties, and structure. Note: The subset may be associated with specific interactions.| | ||
| + | |System store|An input/output element that persists over time, which may be depletable or non-depletable. Note: Non-depletable stores may include data store in computer memory, and depletable stores may include energy in a battery, or fluid in a tank. Physical stores obey the conservation laws (only take out what is put in). A non-depletable store, such as a data store, is not constrained by the conservation laws. The system store should be differentiated from the storage device, which stores the element.| | ||
| + | |Test case|The input stimulus, expected output, and associated test criteria which verify that the system satisfies its requirements or needs.| | ||
| + | |Test scenario|A scenario which replicates the behavior of the environment that interacts with the system under test.| | ||
| + | |Text based requirement|One or more requirements specified in text.| | ||
| + | |Thread|A process with no concurrent functions, and represents a single path of execution.| | ||
| + | |Time property|A property of the model that represents a local or global time, which other properties may depend on. Note: The property can support continuous or discrete-time models. This variable should not be confused with the measured or computed time that an actual system uses, which depends on a number of implementation specific factors related to clocks, synchronization, etc.| | ||
| + | |Topology|A graph of nodes and arcs.| | ||
| + | |Trade-off study|An evaluation of alternatives based on a set of evaluation criteria.| | ||
| + | |Transition|Response to events/conditions, which triggers a behavior.| | ||
| + | |Triggering input|An input which is required for a function to be activated.| | ||
| + | |UML|A visual modeling language used for representing systems | ||
| + | |User|An individual or group of individuals that use a system.| | ||
| + | |Validation|The process for demonstrating that a system or its requirements satisfy the stakeholder needs.| | ||
| + | |Variance|A measure of the distribution about the mean of a probability distribution. Refer to the mathematical definition associated with a probability distribution.| | ||
| + | |Vector|A data type, which specifies a magnitude and direction.| | ||
| + | |Verification|The process for demonstrating a system satisfies its requirements.| | ||
| + | |Verification procedure|The functions needed to support execution of a test case. Note. This may include generating an input stimulus and monitoring an output| | ||
sysml-roadmap/secm_concept_definitions_snapshot_1_28_2016.1454027733.txt.gz · Last modified: 2016-01-28 19:35 by roncwilliamson
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