Recently implemented shift-work equations : GMAT Sentence Correction (SC)
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# Recently implemented shift-work equations

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Senior Manager
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01 Apr 2007, 21:53
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Recently implemented â€œshift-work equationsâ€
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02 Apr 2007, 01:27
C

sentence says: recently shift-work equations..... have reduced sickness, sleeping on the job, fatigue....(parallel)

and it also says that production efficieny has been increased in various industries.... (cannot for a parallel construction)

so have raised or and raised cannot come, as its not parallel.
btw Cand E, later is redundant.

chose C

regards,

Amardeep
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02 Apr 2007, 05:03
I think you are referring to the original sentence vs. choice C. Right?
At first, I thought that A was the right choice but when I came across C, I reread the original sentence and realized that C portrays the meaning of the sentence better. The meaning of the sentence is that all of the "bad" factors such as sleepiness and fatigue have decreased but AT THE SAME TIME the productivity went up. The only choice that expresses this meaning is "C". "A" merely lists all the factors.
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02 Apr 2007, 05:30
Ahh...thanks!

Yes, nervousgmat, I chose A.

I tried to make everything parallel. "and have raised" seemed to be parallel with "have reduced"

thought hard between A and C tho.
50% chance and I got it wrong again.
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02 Apr 2007, 06:21
You also need a contrast in this sentence because

reduced W,X,and Y while raising Z

choice C is the only choice that establishes this contrast correctly
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02 Apr 2007, 07:24
Honestly, I feel a bit disadvantaged because I couldn't fathom this question was about BRINGING out the contrast. Grammatically, "have reduced" and "have raised" are perfectly parallel and alright.

I don't deny that C is a more elegant construction - once one has understood the guiding principle - The shift-work equations have reduced X, Y, and Z while raising productivity ..

Raising productivity is active Voice -- while establishes a sense of timing which essentially brings out the contrast -- during the time that fatigue etc were being reduced the productivity was being raised and so on...

I guess with a fair bit of practice alone can these intricacies be understood...

This question actually reminded of the "growth of rail roads led to the abolition of local times DETERMINED by (blah blah) and DIFFERING from city to city etc....

Basically involves establishing parallelism between Past Participle (have reduced) and present participle (raising) ....Not very intuitive but a very powerful concept.
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02 Apr 2007, 12:08
I picked A too..but your explanation is good...thanks..

nervousgmat wrote:
I think you are referring to the original sentence vs. choice C. Right?
At first, I thought that A was the right choice but when I came across C, I reread the original sentence and realized that C portrays the meaning of the sentence better. The meaning of the sentence is that all of the "bad" factors such as sleepiness and fatigue have decreased but AT THE SAME TIME the productivity went up. The only choice that expresses this meaning is "C". "A" merely lists all the factors.
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Re: SC - shift-work equations [#permalink]

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02 Apr 2007, 14:36
C.

Parallel parts:
...have reduced noun, noun phrase, and noun phrase while raising
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02 Apr 2007, 23:45
With all these explanations, i am a bit confused between A & C.

What is OA pls..?
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03 Apr 2007, 04:48
A,B, and D all make it sound like the equation was the cause of the improved efficiency.
E 'was lowered' is redundant since 'reduced' has already been mentioned earlier in the sentence.

C is best.
03 Apr 2007, 04:48
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# Recently implemented shift-work equations

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