Messages

1

General Board / Flow Allocation

« on: March 26, 2020, 10:17:31 pm »

Does EA 15.1 support allocation of ObjectFlow to Connector? I see the following in SysML 1.5 specification:

15.4.2 Allocate Flow
Figure 15.5 shows flow allocation of ObjectFlow to a Connector, or alternatively to an ItemFlow.

I could not however figure this out in EA Relationship Matrix as ObjectFlow/Connector is not listed as a type in the Type drop down list. I only see ObjectNode/Port.

Strangely, SysML 1.5 shows Pin to Port allocation is not addressed. But that is what is available in EA 15.1 with SysML 1.5.

Pin to Port allocation is not addressed in this release of SysML.

2

General Board / Value Type, Quantity Kind and Units

« on: January 02, 2020, 10:51:58 pm »

I am confused about value types. I understand that quantity kind could mean a physical quantity like temperature and the unit is the SI unit of measure degree centigrade. What exactly is value type here? Is it the description of the value I am trying to measure?

For example:
Value Type: Micro-controller Temperature
Quantity Kind: Temperature
Unit: Degree Celsius

3

General Board / Re: SysML Block Operation and Action Allocation

« on: October 15, 2019, 11:12:21 pm »

Well, if you use things like operations, receptions, or classifier Behaviour the coupling between structure and behaviour is strong/fixed.
If you use allocation the coupling is weaker and you can have many different behaviour of the same structure.
Example: You can have processor like a intel core and you can allocate linux or windows on it. The processor is not fix coupled to windows only.

Thanks for the answer! Makes a lot of sense.
Is there an example where operation is appropriate? Or should we just stick to allocation over operation all the time?

4

General Board / SysML Block Operation and Action Allocation

« on: October 15, 2019, 09:49:52 pm »

What is the difference between allocating actions from activity diagrams to a block versus defining operations for blocks. From my understanding, an operation seems to be a behaviour that a block can perform which seems to be the same as an action allocation to a block. Is there any specific modelling use case on when action allocation should be used over operation of a block and vice versa?