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You take the evidence gathered from earlier experience and use it to base an estimation on.
Sound familiar?
It is an "evidence based estimation".
--edit
Yeah, I am having trouble with basic math today 
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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The point is, you can't really blame Explorer for something it (or anything or anybody else) cannot predict quite accurately. I mean, who knows beforehand how many bricks you'll lay on Thursday, Friday, Saturday...? Maybe if everything goes fine you do 20 per day but then you get sick on Friday and can't continue until Monday...
The only thing you can blame Explorer for is that it shows the estimated remaining time at all and you forget it's just an estimate, which can be a highly dynamic variable. If everything goes well, the estimate is just fine, but if something goes wrong (corrupted file, etc.) it loses all of its meaning. It should just show the percentage and progress bar, because it's the best indicator to see if the copying process got stuck.
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That's where opinions vary. For time-consuming and long-running operations the progressbar would take an awfull lot of time to increase a percent. It would not give any indication whatsoever on its relative speed, nor whether it is actually still alive (or just crashed and running an never-ending loop).
FIorian Schneidereit wrote: if something goes wrong (corrupted file, etc.) it loses all of its meaning
It doesn't; it uses the longer task to calculate a new average.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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It's likely to be inaccurate, no matter which way you calculate it.
Bigger files copy at a higher speed than small files, so two very large files will copy a lot (a LOT!) faster than a thousand smaller files with the same total size.
The trouble is that you don't want to be running the kind of incredibly complex calculations required for accurate estimates at the same time as you're copying the files.
Could it be better? Sure.
Could it be much better? Not worth it.
I wanna be a eunuchs developer! Pass me a bread knife!
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Yes, add in a little code to help the user, and you're a bastard.
It ain't the application that decided on that behaviour, it was a programmer. And yes, I think it is quite helpfull to "guess" the time required to complete an action, based on the time required to do part of that action. Yes, if the action consists of multiple blocks that have a varying time, then the estimate will change.
It is those kind of users that should be greeted with a black screen that says "processing, come back when I'm done" without any indication that the computer is active at all.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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Eddy Vluggen wrote: It ain't the application that decided on that behaviour, it was a programmer
Specifically, this[^] guy.
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Try using ROBOCOPY[^] instead...I use it when I have to move my ever expanding pile of crap library to a new drive.
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YOu know it would seem like uSoft with all it's resources would have the best Windows utilities that could be had but it seems like they just cobble something together and pass it from generation to generation. And then when someone makes a superior utility they just buy it, I don't understand the logic.
New version: WinHeist Version 2.1.0 Beta
Have you ever just looked at someone and knew the wheel was turning but the hamster was dead?
Trying to understand the behavior of some people is like trying to smell the color 9.
I'm not crazy, my reality is just different than yours!
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At least they added the qualifier, "About..." It used to be just as inaccurate, but absolute.
Will Rogers never met me.
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With a mother and father like those, you're surprised the kid is a liar ?
« I had therefore to remove knowledge, in order to make room for belief » Immanuel Kant
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I never worked for a company that let me use flash drives to take work home. Always been issued a laptop and/or remote login via citrix.
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Don't you get the graph that shows the all the past rates, current rate and a floating line for the average?
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Also, if you are copying a number of files, xcopy is usually way faster.
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now you're sixteen, I guess it's legal to, erm, be intimate with people...
WTH - you've been doing that for years!
PooperPig - Coming Soon
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Yeah, but in Internet years Google is around 60 years old, and they've been taking improper advantage for years...
Software Zen: delete this;
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Especially with my personal data.
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Typical.
Applying laws from one particular country, and expecting the rest of the world to just accept them...
I wanna be a eunuchs developer! Pass me a bread knife!
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Everyone in Australia will know why I'm a happy man this morning,
cheers
Chris Maunder
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Even sweeter without Buddy?
Peter Wasser
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell
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Those poor birds, being mauled by raptors.
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I turned the dammed thing off at 3/4 time, not sorry with that score line! Gotta say they played out of their skins in the first 3/4.
Never underestimate the power of human stupidity
RAH
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Congrats to Hawthorn in the finals. Now shoot me a kiwi should know such things!
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A close game indeed - hopefully you were on the DT's 
PooperPig - Coming Soon
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ahh lets think... nope i got nothin'
Bryce in Brisbane
MCAD
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