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This usage of 上 is still difficult for me. In the context of a sentence I may
be able to understand what it does mean, but I can't get the feeling that
would tell me: this a situation where using it would be appropriate.
(Sometimes I have the feeling that it fits the definition
[goo辞書ー➊.６ゥ](http://dictionary.goo.ne.jp/jn/17464/meaning/m0u/%E3%81%86%E3%81%88/)
but that's not always the case (moreover in the example provided in this
definition 上 is followed by に so, that doesn't match so much).

For example this sentence ([from this
question](https://japanese.stackexchange.com/questions/17470/how-to-
read-%E9%80%A3%E4%BD%93%E5%BD%A2-%E4%B8%8A))

> 外国人が日本語を習得する上で難しい点がたくさんあります。  
>  There is a lot of difficulties for foreigners who learn Japanese.



> 「いつ製造され、いつ出荷され、どこのお店で販売されたのか」…この「食の履歴」が『安全・安心』をお約束する上でとても重要な「食のトレーサビリティー」です。
> "When has been made, when has it been send, where has it been sold" ... This
> "history of the product" is the important "product trace-ability" that we
> need to ensure that the product is safe.



> 店舗を運営される上で一番重要な事は、お店のコンセプトと戦略です。  
>  Here I don't even get the point because I would expect 運営させる.



Another example, raising from browsing through [the recent
question](https://japanese.stackexchange.com/q/34141/4216):

> もののあはれ（もののあわれ、物の哀れ）は、平安時代の王朝文学を知る上で重要な文学的・美的理念の一つ。(Wikipedia)  
>  Mono no aware is a concept related to aesthetic which is capital in order
> to understand the literature written during the Heian dynasty.

Could somebody clear the fog around this use of 上で? If you need more examples
I will try to find some more, but I feel it is used a lot and I have already
already crossed of it many times, and I would like to eventually understand
it?

EDIT: There seems to have some overlapping with ために in the last example for
example.
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grammar meaning usage
In which case should I use 連体形＋上で?
The usage of 〜上で is a little tricky to learn but after reading hundreds of
sentences using it I finally started to get a grasp of it.

To put it simply, I feel that in the above passages it has the nuance of "when
doing ~".

[This](http://www.weblio.jp/content/%E4%B8%8A%E3%81%A7) site describes 上で with
two definitions, the latter which is:

> 特定の範囲内において、といった意味の表現。
>
> An expression that means "with respect to being in within a certain domain
> or scope" [my rough translation]

So for the first sentence, it is saying "with respect to the domain of
foreigners studying Japanese, there are some difficult points". This isn't
exactly natural English, but maybe it will help you get the concept a little
better.

Also, as your 2nd and 3rd examples note, this phrase can be used when talking
about what is "necessary" in a certain situation.

[Here](http://selftaughtjapanese.com/2015/06/26/the-
pattern-%E3%80%8C%E3%80%9C%E4%B8%8A%E3%81%A7%E3%80%8D/) is a post I wrote
about 〜上で with a few other comments about this phrase and example sentences.

EDIT: In response to 駑馬十駕's comment about more detail, I'll add a little more
to my answer.

While at the beginning I said that 〜上で has the nuance of "when doing ~", based
on the dictionary I quoted, it can be seen to have a more specific feeling of
"with respect to being within a certain domain", which means it is limiting a
discussion to a certain circumstance.

I think if we look literally at the 上 part, we can think of this expression as
setting a domain, and then talking "on top of it", in other words using that
domain as a basis for further discussion. The で is consistent with having a
discussion at that "location" (i.e. この部屋で会話する".

Also, I think it's important to note that this expression has an formal nuance
to it, such that I don't think it is used in everyday conversation too much.
I'm sure you will see it in business Japanese (more formal written or spoken
language), however.
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