Constraint Block Parametric Diagram
The Constraint Block Parametric Diagram pattern creates elements and a diagram representing the usage of three Constraint Blocks in the context of a bounding Constraint Block. The parameters of the constraint properties are bound to each other and in turn to the parameters of the bounding Constraint Block effectively describing a system of equations.

Figure 1. Shows a Parametric Diagram that contains a number of Constraint Blocks Usages representing equations and their parameters.

Figure 2. Shows a Block Definition Diagram that contains a number of Constraint Blocks connected to the Composite Constraint Block with Composition Associations.
Discussion
The purpose of the pattern is to allow Systems Engineers to create systems of equations that can be used to constrain the properties of Blocks or Constraint Blocks.

The pattern is typically used during the analysis phase when the constraints and equations that govern or constrain behavior have been determined. The usage includes the following:
·	They can be used as the pre-cursors to simulations that can be used to visualize the equations and perform detailed analysis.
They can be used as the basis for trade studies.
They can be used as a formal method of documenting a system's equations and how they relate to each other in the context of a bounding Constraint Block.

The following is a list of some things you may want to do when working with this pattern.
·	Change the hierarchy by adding or removing Components.
Change the names of the Components, Parts and Interfaces to suit your initiative.
Change and create additional operations in the Interface elements.

The following is a list of some of the next steps available when applying the pattern.
·	The parametric diagrams can be used as the  basis for trade studies.
Create simulations using the SysML simulation facility built into the product.
Create documentation of the Constraint Blocks with the Document Generator using built-in or user-defined templates.

Useful Workspace Layouts Core | Core Modeling, Wide View
Reference
The following help topics will assist you learn about how to work with this pattern.
Parametric Simulation using OpenModelica
SysML Simulation Examples
Model Simulation

The following are some of the tools that will be helpful when working with this pattern.
Parametric Simulation
The Parametric Simulation facility allows SysML parametric models to be subject to detailed engineering analysis, including the evaluation of key metrics such as performance, reliability and other physical characteristics. These models combine requirements models with system design models, by capturing executable constraints based on complex mathematical relationships. For more details see the Parametric Simulation using OpenModelica help topic.
Traceability Window
The Traceability Window automatically displays the relationships that exist between Use Cases and other model elements including up-process and down-process elements. The traceability tree view can be conveniently expanded to see deeper relationships and elements displayed in the window can be located in all diagrams in which they appear. For more details see the Traceability Window  help topic.
Relationship Matrix
The Relationship Matrix provides a spreadsheet like view of two groups of elements and the relationships that exist between them. It can be a used as a powerful analysis mechanism to visually indicate how elements are related to each other and to discover which elements are missing relationships. For more details see the Relationship Matrix  help topic.
Specification View
The Specification View can be used as a way of working with any element type in a spreadsheet or word process view. It is particularly useful when there are a large number of elements as is typically the case when describing a system of any appreciable size. For more details see the Specification View help topic.
Element Discussions
The Element Discussion facility is a fully featured collaboration tool allowing modelers and model viewers and reviewers to communicate with each other directly inside the repository. Modelers using the full client or occasional viewers using WebEA can both post and reply to discussions and communicate and engage in chat. For more details see the Element Discussions help topic.
Hand Drawn and Whiteboard Diagrams
The Hand Drawn and Whiteboard Mode are display options available for any diagram that changes a system-drawn diagram to appear as though it was drawn by hand and, optionally, hand drawn on a whiteboard. It is a powerful device to engage an audience by presenting the diagram in a rough and more immediate style giving the impression that it is just a sketch that can be changed. For more details see the Hand Drawn and Whiteboard Mode help topic.
Diagram Layout
The Diagram Layout tool allows you to layout an entire diagram, selected elements or sections of a diagram to make it more visually appealing or meaningful to a particular audience. There are a wide range of layout types to choose from and some types have filters that can be applied. For more details see the Diagram Layout help topic.
Pan and Zoom
The Pan and Zoom facility is one of the tools that can be used to navigate around a large diagram. Often the resolution of a diagram must be reduced to ensure it is wholly visible but by using the Pan and Zoom window you can leave the diagram at a readable resolution and pan around to areas of interest zooming in when necessary. For more details see the Pan and Zoom help topic.
Alternate and Images for Diagram Elements
Most standard elements allow an alternate image to be defined for an element that will be used in place of the graphical notation for the element either on a selected diagram or as a default on all diagrams. For more details see the Using the Image Manager help topic.
Document Generator
The Document Generator is a powerful facility in Enterprise Architect that allows a Database Engineer or other stakeholder to create high quality corporate or technical documentation directly from the model, suitable for internal or external audiences. For more details see the Documentation help topic or the more general topic on Model Publishing.

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