Discuss OMG OMG-OCSMP-MBA400 Exam Topic 3 Question 33

Choose the correct answer

Modehca solvers can produce large volumes of time-based results (such as time-based power usage), but requirements are often based on scalar values such as "maximum peak power" and 'average power usage".

Which of the following is generally the most effective way to verify such requirements?

AImport the Modelica time-based power usage results into SysML Then use SysML parametncs to calculate these scalar values, and compare them to the requirements

Bave the Modelica solver also compute these scalar values from its time-based power usage results Then import the resulting scalar values into SysML. and compare them to the requirements.

CUse the SysML4Modelica profile to transform the Modelica time-based power usage results into these scalar values Then import the resulting scalar values into SysML, and compare them to the requirements.

DModelica models can only produce time-based results and thus cannot support scalar results like these, which must either be calculated using a different tool or measured on physical prototypes Then enter the resulting scalar values into SysML, and compare them to the requirements

Suggested Answer: B

: The most effective way to verify such requirements is to have the Modelica solver also compute these scalar values from its time-based power usage results. Then import the resulting scalar values into SysML, and compare them to the requirements. This way, the verification can be done at the same level of abstraction as the requirements, and avoid unnecessary transformations or calculations in SysML. Modelica solvers can provide various functions and operators to compute scalar values from time-based results, such as max, min, mean, integral, etc. Reference: https://www.omg.org/ocsmp/ocsmp-adv-exam.htm https://modelica.org/documents/ModelicaSpec34.pdf

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14 comments · newest first

Vinnie 10 months ago

C sounds interesting, but is it really effective?

Reita 10 months ago

I think B makes more sense, less hassle.

Gerald 10 months ago

A is definitely the way to go!

Marjory 10 months ago

D seems off, Modelica can handle scalar values, right?

Helaine 10 months ago

Totally agree with A, it’s the most straightforward approach!

Natalie 11 months ago

I thought Modelica could only handle time-based results, so option D seems plausible, but I feel like there's a way to get scalar values too.

Ruthann 11 months ago

I vaguely recall something about the SysML4Modelica profile, but I'm uncertain if that transformation is necessary for this question.

Carrol 11 months ago

I think option B sounds familiar; it seems like having the Modelica solver compute scalar values directly could save time.

Tamra 11 months ago

I remember discussing how importing results into SysML could help with verification, but I'm not sure if that's the most efficient method.

Darnell 12 months ago

I think I understand the question now. The key is finding a way to convert the time-based Modelica results into the scalar values needed for the requirements. Option A or B seem like the best choices for that, but I'm still not 100% sure which one would be most effective.

Talia 12 months ago

Hmm, I'm not sure if any of these options are really ideal. Option D makes it sound like Modelica can't handle the required scalar values, which seems problematic. I might need to think this through a bit more.

Genevieve 12 months ago

Option C looks promising to me. Using the SysML4Modelica profile to transform the Modelica results into the right format seems like it could be the most straightforward way to handle this.

Leeann 1 year ago

I'm a bit confused by the question. It seems like we need to find a way to convert the time-based Modelica results into the scalar values required by the requirements. I'm not sure which option would be the most effective for that.

Billy 1 year ago

This looks like a tricky one. I'm not sure if I fully understand the differences between the options, but I think B might be the best approach since it keeps everything in the Modelica solver.

OMG-OCSMP-MBA400 Exam - Topic 3 Question 33 Discussion