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Whats does the expression at scale mean?

Does it mean "on a larger scale" or it means "at a level appropriate to the what's available"? I came up with these two definitions by looking the expression up on the internet, but I still feel very confused.

Here are two sentences:

Over the course of that first afternoon, the next months, and finally over several years, we honed our practice activities into tools that could help make teachers better, at scale

If you seek to do somethings great, you most likely live a battle for talent – for smart and capable people who can do great things at scale.

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Can you please also give the example of where you first saw it and which, presumably, prompted this question? – TrevorD Jun 14 '13 at 12:58
I'm reading a book called "Practice Perfect", which talks about the power of practice in Education... – Maria M. Jun 14 '13 at 13:05
I meant, can you please copy the sentences where you first read it - or are those the sentences you have copied? – TrevorD Jun 14 '13 at 16:08
these are the sentences I have copied... – Maria M. Jun 14 '13 at 16:56
The two sentences look to be written a technical dialect. As such, general references won't pin down the term's correct meaning in context. For that, you'll have to go to the Education literature. – Wayfaring Stranger Jun 14 '13 at 17:23
up vote 2 down vote accepted

See scalability (Wiki)

scalability is the ability of a system, network, or process to handle a growing amount of work in a capable manner or its ability to be enlarged to accommodate that growth.

In the given cases,

tools that could help make teachers better, at scale

implies those that could measure up to the size of the task.

people who can do great things at scale.

similarly implies people who can do great things when those things manifest in a real-life (larger) systems. It is easier to demonstrate a prototype supersonic aircraft, but extremely complex to build a really usable/ commercial product of the same design concept.

We do not say on a large scale in this context, but instead we say at scale, because the magnitude could either increase or decrease from time to time. Adapting accordingly and producing comparable results in all cases is a challenge in itself. Think prosthetic & orthotic devices, for one.

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So, in this context, at scale essentially means not just on a small scale. Interesting. – J.R. Jun 14 '13 at 18:47
@J.R. Not quite. My effort was to clarify that it not necessarily up-scaling alone, nor is it about uncommonly large sizes. Scalability relates only to difference in size, in either direction, to a smaller or greater extent on the scale. In some cases, small is difficult, in yet others, 'scaling' to a particular size is difficult. Think microminiaturization; think custom-designed medical devices to fit an individual patient. – Kris Jun 15 '13 at 4:33
Kris: I was unfamiliar with that phrase until I read your answer; it prompted me to look up some example usages. In this case (i.e., in the quotes cited by the O.P.), I think the phrase does mean not just on a small scale, in that the authors are saying that their techniques won't just help one or two teachers here and there, but have the potential to improve an institution's faculty at scale. I understand your point, though, about how the phrase is flexible enough to go in the "smaller" direction. Like I said, this was interesting. – J.R. Jun 15 '13 at 8:33

I think it's the same as 'at a large scale' when used loosely. I've got an example that reads 'Provide powerful and easy-to-use solutions at scale.' This, in my opinion, means that those solutions are intended for a large group of recipients, not just a few, which is why I think the meaning is the same as in 'at a large scale.'

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