computer science

Self-contained system (software)

Self-contained system (software) 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 Self-contained system (software) rather than just read about it. In short: In computing, self-contained system (SCS) is a software architecture approach that focuses on a separation of the functionality into many independent systems, making the complete logical system a collaboration of many smaller software systems. Self-contained system characteristics SCSs have certain characteristics: Each SCS is an autonomous web application.

Key takeaways

Self-contained system (software) 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 Self-contained system (software) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Self-contained system (software) from memory before moving on to harder problems.

Reference excerpt

In computing, self-contained system (SCS) is a software architecture approach that focuses on a separation of the functionality into many independent systems, making the complete logical system a collaboration of many smaller software systems.

Self-contained system characteristics SCSs have certain characteristics:

Each SCS is an autonomous web application. Each SCS is owned by one team. Communication with other SCSs or third-party systems is asynchronous wherever possible. An SCS can have an optional service API. Each SCS must include data and logic. An SCS should make its features usable to end-users by its own UI. To avoid tight coupling an SCS should share no business code with other SCSs. Shared infrastructure should be reduced to increase availability and decrease coupling. Implementations create larger systems using this approach – in particular web applications. There are many case studies and further links available.

Self-contained systems and microservices While self-contained systems are similar to microservices there are differences: A system will usually contain fewer SCS than microservices. Also microservices can communicate with other microservices – even synchronously. SCS prefer no communication or asynchronous communication. Microservices might also have a separate UI unlike the SCS that include a UI.

Self-contained systems and Vertical Slice Architecture Self-contained systems and vertical slice architecture have similarities but also decisive differences. Both approaches divide a system into smaller, manageable units. Vertical slices are cut on the basis of features, Self-contained systems along the boundaries of functional domains. They also differ in the strictness with which they attempt to encapsulate and isolate specialized logic.

Usage There are quite a few known usages of SCS – e.g. at Otto, Galeria Kaufhof, and Kühne+Nagel.

References

Worked examples

Example 1 — a first encounter with Self-contained system (software)

Start with the simplest possible case. Write down what Self-contained system (software) 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 Self-contained system (software) 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 Self-contained system (software) 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 Self-contained system (software)

In research: Self-contained system (software) 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 Self-contained system (software) 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: Self-contained system (software) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Architectural pattern (computer science), Software engineering stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Self-contained system (software) 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 Self-contained system (software) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Self-contained system (software) 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 Self-contained system (software) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Self-contained system (software) in simple terms?

Why does Self-contained system (software) 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 Self-contained system (software)?

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 Self-contained system (software).