computer science

Rhapsody (modeling)

Rhapsody (modeling) is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Rhapsody (modeling) rather than just read about it. In short: IBM Engineering Rhapsody (formerly Rational Rhapsody), a modeling environment based on UML, is a visual development environment for systems engineers and software developers creating real-time or embedded systems and software. Rhapsody uses graphical models to generate software applications in various languages including C, C++, Ada, Java and C#.

Key takeaways

Rhapsody (modeling) belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Rhapsody (modeling) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Rhapsody (modeling) from memory before moving on to harder problems.

Reference excerpt

IBM Engineering Rhapsody (formerly Rational Rhapsody), a modeling environment based on UML, is a visual development environment for systems engineers and software developers creating real-time or embedded systems and software. Rhapsody uses graphical models to generate software applications in various languages including C, C++, Ada, Java and C#. Developers use Rhapsody to understand and elaborate requirements, create model designs using industry standard languages (UML, SysML, AUTOSAR, DoDAF, MODAF, UPDM), validate functionality early in development, and automate delivery of high structured products. Rhapsody Model Manager is a web based application that stakeholders, developers, and other team members use to collaborate on the design of products, software, and systems. The product contains a server that hosts model designs which have been developed in Rhapsody. A client extension component included with Rhapsody allows users to connect to a Design Manager server. After connecting to the server, models can be moved into project areas with specific modeling domains based on the industry standard languages supported by Rhapsody. Rhapsody Model Manager also integrates with the IBM solution for Engineering Lifecycle Management (ELM). In this environment, artifacts can be associated with other lifecycle resources such as requirements (via IBM Engineering Requirements Management DOORS, DOORS Next), change requests and change sets of sources (the IBM Engineering Workflow Management), and Quality Assurance test cases (the IBM Engineering Test Management). Global Configuration control allows different teams and different projects to interact in a synchronised setup that integrates deliveries and baselines within each of the tools in the CLM solution.

History Rhapsody was first released in 1996 by Israeli software company I-Logix Inc. Rhapsody was developed as an object-oriented tool for modeling and executing statecharts, based on work done by David Harel at the Weizmann Institute of Science, who was the first to develop the concept of hierarchical, parallel, and broadcasting statecharts. In 2006, I-Logix's shareholders sold the company to Swedish software company Telelogic AB. Rhapsody became a Rational Software product after the acquisition of Telelogic AB in 2008, like all former Telelogic products. Since the rebranding, Rational Rhapsody has been integrated with the IBM Rational Systems and Software Engineering Solution. Rational Rhapsody Design Manager was first released in June, 2011 by IBM. In December 2011, the product was integrated as a design component in IBM Engineering Lifecycle Management solution.

Illustrations

Worked examples

Example 1 — a first encounter with Rhapsody (modeling)

Start with the simplest possible case. Write down what Rhapsody (modeling) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rhapsody (modeling) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rhapsody (modeling) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rhapsody (modeling)

In research: Rhapsody (modeling) appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Rhapsody (modeling) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Rhapsody (modeling) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Diagramming software, Enterprise architecture, Enterprise architecture frameworks, so understanding it makes those chapters shorter.
In everyday life: Look for Rhapsody (modeling) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Rhapsody (modeling) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rhapsody (modeling) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Rhapsody (modeling) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rhapsody (modeling) in simple terms?

Why does Rhapsody (modeling) matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rhapsody (modeling)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rhapsody (modeling).