Ils veulent fabriquer vite, c'est pourquoi la production est rapide.

Questions & Answers about Ils veulent fabriquer vite, c'est pourquoi la production est rapide.

Why do we use c'est pourquoi here, and could we use par conséquent instead?
C'est pourquoi translates literally to "that is why" and introduces the consequence of the first clause. You could absolutely use par conséquent (therefore or consequently) here instead. Both of these consequence connectors are followed by a standard sentence in the indicative mood, so you don't need to worry about using the subjunctive or changing the word order!
This sentence uses both vite and rapide. How do I know which one to choose?
This sentence is a perfect example of the difference! Vite is an adverb meaning "quickly", so it describes how an action is done (the verb fabriquer). Rapide is an adjective meaning "fast", so it describes a thing (the noun la production). Just remember that adverbs modify verbs, while adjectives modify nouns.
Could I use faire instead of fabriquer for "to manufacture"?
While faire (to make or do) is a very common and versatile word, fabriquer specifically means to manufacture, produce, or build something physically. Because this sentence is talking about business and la production, fabriquer sounds much more precise and professional.
Why does c'est pourquoi use c'est instead of il est?
C'est pourquoi is a fixed phrase in French. Even though we sometimes translate "it is" as il est in certain other grammatical contexts, for this specific consequence connector meaning "that is why", you must always use c'est.

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