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A significant number of complex repair jobs carried out by Ace Repairs

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A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 06 May 2009, 14:17
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A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

The argument above assumes which of the following?

(A) There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.

(B) There is no company that successfully competes with Ace Repairs for complex repair jobs.

(C) Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs.

(D) Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked.

(E) There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 06 May 2009, 15:46
1
A

rework jobs could be due to lack of competence that an employee may have, not lack of concentration. Another employee may just be better at the job
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 02 Jun 2014, 00:24
A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.
Premises:
More complex repair jobs have to be reworked under warranty.
2. Reworked jobs are satisfactory
3.initial repairs are inadequate
Conclusion:
Reworked jobs are done with focused concentration and reliably than first time jobs.

I ended up with Options(C) & (D), but didn't thought about option(A). Can you please explain where I went wrong? Why A is correct? Why C & D are wrong?
c) Warranty is not available for reworked jobs. So, these are done with more concentration.
d) Negation of this makes the conclusion more believable.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 05 Jul 2015, 03:02
Its a necessary assumption question.


A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

The argument above assumes which of the following?

A. There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.Correct

B. There is no company that successfully competes with Ace Repairs for complex repair jobs.Irrelevant Information

C. Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs. .Contradict with the argument by providing opposite information

D. Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked.Outside The Scope of the Argument

E. There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily.Outside The Scope of the argument
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 29 Dec 2015, 03:28
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Answer: (A)

An assumption is something that HAS to be true for the argument to hold.

Consider the argument and how it is made:
1. Many R (complex repair jobs) have to be reworked.
2. Reworked jobs are satisfactory, but initial jobs are not.
3. Therefore, mechanic competence is not the problem, something else must be (viz. concentration rather than skill)

The conclusion of the argument is hidden in the second point. The author concludes that reworks are NOT because of a lack of skill. Now, what could make this argument fall apart? What if there are two different sets of people that carry out initial repair vs. reworks? Hmm... Indeed, if that's the case, the conclusion cannot be drawn. So, for the author to reliable draw the conclusion, this must be FALSE - the set of workers MUST be the same.

Let's see what the options suggest (see inline):

Huajun wrote:
A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company's warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

The argument above assumes which of the following?

[A] There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs. =>
If this is FALSE, i.e. if there IS a difference between the workers, the argument falls apart. Thus, above statement is necessary for the argument to hold and is therefore an assumption.
[B] There is no company that successfully competes with Ace Repairs for complex repair jobs. => out of scope. other companies are irrelevant.
[C] Ace Repairs' warranty is good on first-time jobs but does not cover rework jobs. => suppose it does cover rework jobs. does that have any bearing on the conclusion about worker skill? no. thus, negating the statement does not affect the argument. therefore, this is not something on which the argument DEPENDS.
[D] Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked. =>irrelevant. it doesn't matter if they do penalize the mechanics. negating this does not have any bearing on mechanic skillset.
[E] There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily. => there might be some such categories. a significant number does not mean "all". also, this is not related to the skill of mechanics.

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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post Updated on: 02 Jan 2016, 00:02
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The author has clearly stated in the premise that the initial repairs are inadequate not because the mechanics lack competence but because focus is more when the work is done a second time. So, he definitely assumes that the mechanics who do the job the first time and those who do the rework belong to the genre which is what is stated in "A". If you reverse the answer choice that is there is systematic difference then in the reversed form the answer choice goes against the conclusion.
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Originally posted by AryamaDuttaSaikia on 31 Dec 2015, 02:46.
Last edited by AryamaDuttaSaikia on 02 Jan 2016, 00:02, edited 2 times in total.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 31 Dec 2015, 07:28
A is definitely the winner, but, I think, A could have been worded better. "systematic difference in membership" does not necessarily mean difference in competence.

What if the reworks are actually done by a different group, which has the same competence as the group which did the first hand job?
In such case, negating A does not shatter the conclusion that the competence is not the reason behind the need to rework.

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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 02 Jan 2016, 01:42
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Systematic difference in membership" holistically encompasses all factors. "Systematic difference in competence" would be too specific.The very phrase "No systematic difference in membership" indicates that the two sets of people that is, the group involved in the first time work and the group doing the rework happens to be the same. But if we change the wording to "systematic difference in membership" then it might imply to two different groups which would go against the conclusion. Remember assumptions are made by the author himself and these would invariably support the conclusion,not go against the conclusion.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 02 Jan 2016, 05:59
AryamaDuttaSaikia wrote:
Systematic difference in membership" holistically encompasses all factors. "Systematic difference in competence" would be too specific.The very phrase "No systematic difference in membership" indicates that the two sets of people that is, the group involved in the first time work and the group doing the rework happens to be the same. But if we change the wording to "systematic difference in membership" then it might imply to two different groups which would go against the conclusion. Remember assumptions are made by the author himself and these would invariably support the conclusion,not go against the conclusion.



Hi Aryama,

Thanks for ur reply. I think there is a typo in ur response (marked in red). I understand what u said and agree that A is a 100% valid assumption.

Just let me know one thing, how is it against the conclusion that there are two groups of identical competencies. One did the first job, second the rework. Still the conclusion holds that the competency isn't the factor behind the errors, isn't it?

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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 07 Jan 2016, 03:35
Yes you are correct. "Competency" is not the factor behind the errors. "Concentration" or the focus of the workers is the factor which contributes to the difference in the work. When the same group is doing the repair work for the first time the concentration is less but during the rework the focus is more. It is clearly implied in the argument that the members of the group are necessarily not different. Just the focus differs.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 25 Sep 2016, 20:44
A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

Type - Assumption
Boil it down - Not lack of competence , but lack of focused concentration causes initial repairs to be inadequate
Pre-Thinking - The mechanics involved in initial repair and those involved in rework have the same level of competency


The argument above assumes which of the following?

A. There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.
Correct
B. There is no company that successfully competes with Ace Repairs for complex repair jobs. Irrelevant
C. Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs. Irrelevant
D. Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked. Incorrect - even if it does penalize , this is not an assumption
E. There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily. Out of scope - as we have only concerned with the repair jobs that need rework

Answer A
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 13 Oct 2016, 00:55
Can someone please tell me why E is incorrect.

I am continuously choosing trap answer for assumptions questions. If someone can please tell me what is the difference between A and E . They both seems like assumptions author is making.

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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 13 Oct 2016, 01:22
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megha_2709 wrote:
Can someone please tell me why E is incorrect.

I am continuously choosing trap answer for assumptions questions. If someone can please tell me what is the difference between A and E . They both seems like assumptions author is making.

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The whole argument is about complex repair jobs and their rework.

E is a very extreme answer choice stating that there is NO repairing job that could be done first time satisfactorily.

There could be some non complex repairing jobs that are done satisfactorily first time itself. So, E is a straight out.

Remember, in assumptions, one should always avoid Extreme answer choices.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 30 Apr 2017, 03:36
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Premise :- Mehanics do not lack competence.
Conclusion :- Reworked jobs are done with focused concentration and reliably than first time jobs.

Try negating A again. It actually does weaken the conclusion. Negating A says that there is some systematic difference in memberships between the group of mechanics who do 1st time jobs and those that do rework jobs. The author says that the rework jobs are always done correctly. His conclusion is that this is not due to a lack of competence by the mechanics, but rather by gained concentration in the 2nd jobs. So he makes an assumption that the same set of mechanics are working on the first job as are working on the rework. If there is a second group of mechanics that takes care of the reworks, than the faulty first repairs could have been the result of incompetent mechanics.

E talks about only repair jobs and the argument is about complex repair jobs..
So saying that there is NO category of repair jobs in which Ace Repairs.... is not warranted by the argument ...

Hence A.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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New post 20 Aug 2017, 10:36
At first glance, neither of the options make sense. Since option B,C,D and E are totally irrelevant, that's why I chose A. But, even option "A" is awfully written. What does the part in red refer to? What sort of membership is the option talking about? It could have been written in a better way.

A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

The argument above assumes which of the following?

[A] There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.

[B] There is no company that successfully competes with Ace Repairs for complex repair jobs. -Out of scope

[C] Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs. -Out of scope

[D] Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked. -Out of scope

[E] There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily. - This is a very extreme sentence.
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Re: A significant number of complex repair jobs carried out by Ace Repairs  [#permalink]

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