Система явно работает.

Система is in the nominative singular.

Why:

• It is the subject of the sentence — the thing that is doing the action.
• Many feminine nouns ending in -а have -а in the nominative singular.

So:

• система = nominative singular
• dictionary form: система

Because the sentence means the system works / is working, система is the subject, so nominative is exactly what you expect.

Работает is the 3rd person singular present-tense form of работать (to work).

Conjugation:

• я работаю — I work
• ты работаешь — you work
• он / она / оно работает — he / she / it works
• мы работаем — we work
• вы работаете — you work
• они работают — they work

Since система is singular and is treated as она because it is a feminine noun, the verb must be работает.

In Russian, the verb to be is usually not used in the present tense in simple sentences.

So where English says:

• The system is working
• The system is functional
• The system is clearly working

Russian often simply says:

• Система явно работает.

There is no present-tense есть here. Using есть would usually sound wrong in this sentence.

Явно is an adverb. It commonly means:

• clearly
• obviously
• evidently
• sometimes plainly

In this sentence, it modifies работает:

• явно работает = is clearly working / clearly works

A useful point: явно often expresses the speaker’s judgment that something is obvious from the evidence.

The usual stress is:

• систе́ма
• я́вно
• рабо́тает

So the sentence is pronounced approximately:

• syees-TYE-ma YAV-na ra-BO-ta-yet

A more careful breakdown:

• систе́ма → stress on те
• я́вно → stress on the first syllable
• рабо́тает → stress on бо

Yes, it can change. Russian word order is relatively flexible.

The neutral order here is:

• Система явно работает.

This sounds natural and straightforward: subject + adverb + verb.

Other orders are possible, but they change emphasis:

• Явно система работает. — marked; emphasizes явно
• Работает явно система. — unusual in most contexts; stronger emphasis or contrast
• Система работает явно. — possible, but less natural here; it can sound like явно is being added afterward

For most learners, Система явно работает is the best default version.

Работать is imperfective.

That is the normal choice because the sentence describes:

• an ongoing process,
• a general state,
• or a fact in the present.

Russian perfective verbs normally do not have a true present tense. Their present-looking forms usually refer to the future.

So if you want to say that the system is functioning now, работает from работать is correct.

It can mean either, depending on context.

Russian present tense often covers both:

• The system works
• The system is working

So:

• Система работает. can mean either The system works or The system is working
• Система явно работает. can mean The system clearly works or The system is clearly working

Russian does not usually make the same strict simple-vs.-continuous distinction that English does.

Because it modifies the verb работает, not the noun система.

Compare:

• явно работает — works clearly / is clearly working → adverb
• явная проблема — an obvious problem → adjective явная modifying a noun

So in this sentence:

• явно answers something like how? in what way is it working?
• That makes it an adverb.

It is grammatically possible, but it is usually less natural in this context.

Why:

• Russian adverbs often go naturally before the verb when they comment on the whole action or the speaker’s evaluation.
• явно работает sounds more idiomatic for is clearly working

Система работает явно may sound as if явно is being added with special emphasis, or it may feel slightly awkward depending on context.

So the best choice for a neutral sentence is:

• Система явно работает.

Russian has no articles like a, an, or the.

So система can mean:

• a system
• the system

Context tells you which one is meant.

In a sentence like this, English often uses the system, but Russian simply says:

• Система явно работает.

It is a broad word, just like English system.

It can refer to:

• a technical system
• a computer system
• a political system
• an organizational system
• a bodily system
• a method or structure of operation

So the sentence can work in many contexts, not just computer-related ones.

Yes, absolutely. It sounds natural.

It could be used in situations like:

• testing software or equipment
• checking whether some process is functioning
• observing that a method is producing results
• noting that something is clearly operational despite doubts

It is a normal, idiomatic sentence:

• short,
• direct,
• and very usable in real speech.