Figure D.32 - Establishing Mathematical Relationships for Fuel Economy Calculations (Parametric Diagram)

Gallery
Tutorial
TRAIL: The SysML-1.6 Hybrid SUV sample and specification diagrams in MagicDraw/Cameo (with annotations) [UNDERGOING UPDATE to SysML1.7]
Section
Section: SysML-1.6: HSUV sample
SysML keywords
HSUV sample problem
SysML Parametric Diagram
constraint parameter
constraint property
BindingConnector
Slide kind
SysML Parametric Diagram
Click on the image to view it full size
SysML-1.6: Figure D.32 aggregation kind on 'delta-t' is inconsistent w.r.t. Figure D.26
SysML-1.6: Figure D.32 does not have 'incline' value property connected
Webel does not recommend constraint parameter names like delta-t. Names like n_em and n_eg with underscores may have some tradition in coding but lowerCamelCase works better together with the UpperPascalCase convention for most Classifiers recommended here:
Avoid punctuation in Property names (except when used to "quote text"). You can usually avoid underscores in Property names (even if they are used in the Type name) if you can "Trust the Type"!
SysML: Naming: Always use either anonymous or first letter lower case for Property, ObjectNode and InstanceSpecification names; no exceptions (unless using names to "quote text")! Valid: 'lowerCamelCase' OR 'tla' vs TLA acronym OR 'uCC' vs UpperCamelCase
The spec figure also has spaces in some of the ConstraintBlock names, this is also not recommended here:
DO NOT use spaces in Property names or Class/Block names! If you want to communicate familiar names of elements within an organisation use a custom stereotype and tagged values (such as 'aka')!
Up next
Figure D.32 - Establishing Mathematical Relationships for Fuel Economy Calculations (VARIATION: labels inside)
Notes
[ISSUE] SysML-1.6: Figure D.32 aggregation kind on 'delta-t' is inconsistent w.r.t. Figure D.26
[ISSUE] SysML-1.6: Figure D.32 does not have 'incline' value property connected
[CONVENTION, NAMING, STYLE]{STRONG} Avoid punctuation in Property names (except when used to "quote text"). You can usually avoid underscores in Property names (even if they are used in the Type name) if you can "Trust the Type"!
[NAMING, POLICY]{STRICT} DO NOT use spaces in Property names or Class/Block names! If you want to communicate familiar names of elements within an organisation use a custom stereotype and tagged values (such as 'aka')!
[NAMING, POLICY]{STRICT} SysML: Naming: Always use either anonymous or first letter lower case for Property, ObjectNode and InstanceSpecification names; no exceptions (unless using names to "quote text")! Valid: 'lowerCamelCase' OR 'tla' vs TLA acronym OR 'uCC' vs UpperCamelCase
[CAPABILITY, FEATURE, STYLE, TIP]{RECOMMENDED} TIP: UML/SysML: MagicDraw/Cameo: Consider showing the constraint parameter name and type label inside the small rectangular parameter symbol on SysML Parametric Diagrams. Dr Darren swears by it!
Snippets (quotes/extracts)
  [SysML-1.6] Since overall fuel economy is a key requirement on the HSUV design, this example applies significant detail in assessing it. Figure D.32 shows the constraint blocks and properties necessary to evaluate fuel economy.
  [SysML-1.6] A property name shown inside or outside the property box may take the form of a multi-level name. This form of name references a nested property accessible through a sequence of intermediate properties from a referencing context.
  [SysML-1.6] A constraint property may be shown on a parametric diagram using a rectangle with rounded corners. This graphical shape distinguishes a constraint property from all other properties and avoids the need to show an explicit «constraint» keyword. Otherwise..
  [SysML-1.6] Figure D.32 shows the use of constraint properties on a parametric diagram. This diagram shows the use of nested property references to the properties of the parts;
  [SysML-1.6] parametric diagrams can make use of the nested property name notation to refer to multiple levels of nested property containment, as shown in this example.
  [SysML-1.6]  A parametric diagram is similar to an internal block diagram with the exception that the only connectors that may be shown are binding connectors.
  [SysML-1.6] The Sample Problem in Annex D provides definitions of the containing EconomyContext block for which this parametric diagram is shown.
Visit also
Visit also (backlinks)
Related slides (includes other tutorials)
Related slides (backlinks, includes other tutorials)