computer science

Network effectiveness ratio

Network effectiveness ratio 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 Network effectiveness ratio rather than just read about it. In short: In telecommunications, the network effectiveness ratio (NER) measures the ability of a network to deliver a call to the called terminal. Busy signals and other call failure due to user behaviour are counted as "successful call delivery" for NER calculation purposes.

Key takeaways

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

Reference excerpt

In telecommunications, the network effectiveness ratio (NER) measures the ability of a network to deliver a call to the called terminal. Busy signals and other call failure due to user behaviour are counted as "successful call delivery" for NER calculation purposes. Unlike ASR, NER excludes the effects of customer and terminal behaviour. NER is a measure of network quality defined by the ITU.

N E R = 100 A n s w e r e d c a l l s + U s e r B u s y + R i n g N o A n s w e r + T e r m i n a l R e j e c t T o t a l C a l l s {\displaystyle NER=100\ {\frac {Answered\ calls\ +\ User\ Busy\ +\ Ring\ No\ Answer\ +\ Terminal\ Reject}{TotalCalls}}}

In general, the NER is used to calculate the effectiveness of the internal interconnect routes.

See also ASR : Answer/Nb address complete message ABR : Answer/Nb of initial address message

References

Worked examples

Example 1 — a first encounter with Network effectiveness ratio

Start with the simplest possible case. Write down what Network effectiveness ratio 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 Network effectiveness ratio 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 Network effectiveness ratio 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 Network effectiveness ratio

In research: Network effectiveness ratio 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 Network effectiveness ratio 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: Network effectiveness ratio is common in secondary-school and first-year university syllabi. It links to neighbouring topics Telephony, Telephony stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Network effectiveness ratio 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Network effectiveness ratio in 20 minutes

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

Frequently asked questions

What is Network effectiveness ratio in simple terms?

Why does Network effectiveness ratio 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 Network effectiveness ratio?

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 Network effectiveness ratio.