computer science

Objectory

Objectory 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 Objectory rather than just read about it. In short: Objectory is an object-oriented methodology mostly created by Ivar Jacobson, who has greatly contributed to object-oriented software engineering. The framework of objectory is a design technique called design with building blocks.

Key takeaways

Objectory 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 Objectory to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Objectory from memory before moving on to harder problems.

Reference excerpt

Objectory is an object-oriented methodology mostly created by Ivar Jacobson, who has greatly contributed to object-oriented software engineering. The framework of objectory is a design technique called design with building blocks. With the building block technique, a system is viewed as a system of connecting blocks with each block representing a system service. It is considered to be the first commercially available object-oriented methodology for developing large-scale industrial systems. This approach gives a global view of the software development and focuses on cost efficiency. Its main techniques are: conceptual modelling, Object-oriented programming, and a block design technique.

References

Worked examples

Example 1 — a first encounter with Objectory

Start with the simplest possible case. Write down what Objectory 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 Objectory 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 Objectory 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 Objectory

In research: Objectory 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 Objectory 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: Objectory is common in secondary-school and first-year university syllabi. It links to neighbouring topics Object-oriented programming, Software engineering stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Objectory 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 Objectory in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Objectory 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 Objectory out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Objectory in simple terms?

Why does Objectory 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 Objectory?

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 Objectory.