There is a fundamental rule in database theory that when data is recorded in a database, it is "immutable
". It cannot be changed. Applications may act on the data, but the integrity
of the underlying data is intact.
Consider a database tracking temperatures over time. The temperature sensor at my house might record into the database that it is 31 degrees F right at this time and date.
That data should always remain intact.
If I query the temperature database tomorrow for today's temperature at 8am, the database should say that it was 31 degrees F. If I query the database 5 months from now... or 5 years from now... the database should always spit back the 31 degree temperature.
The historical answer will always be identical.
This is just a fundamental principle of databases that are tracking data over a period of time.
Klout's Revision of History
In the ongoing kerfuffle about Klout's changes to their "influence metric", nicely summarized by Mathew Ingram over at GigaOm (lots of links to read), one point I haven't seen made is this:
Klout revised its (and your) history!
Consider this... back on Monday when I wrote about how I disliked the way Klout is treating its metric like a game, I included this screenshot:
Now consider this screenshot taken right at this moment that shows my current Klout score and the trend of my score over the last period of time:
Hmmm... where is that "62"?
Instead Klout now shows that my score was 59-ish.
They changed my history.
Now, in my case, I don't really care. My life will not be any better or worse based on whatever changes happen to my Klout Score. Makes zero difference to me.
But for all those people complaining on the Internet about how their Klout score dropped dramatically... not only did it drop, but...
YOU NEVER HAD THAT HIGHER SCORE!
You might claim you had a Klout score of 50, 60, 70, 80, whatever... but nope, you didn't... the chart shows quite clearly that your score never achieved whatever milestone you thought it did.
Changing Algorithms Without Changing History
Now I personally have no issue with Klout changing their algorithm to make it better. In fact, I applaud them for doing so. Algorithms need to change as more experience is attained and more data is collected.
I want better metrics.
So change the algorithm. Go ahead.
But personally I'd love history to be kept intact. Show the change in the algorithm NOW. Sure, the trend graph would show a big drop. Okay. Then, like in Google Analytics, we can all make a notation that the algorithm was changed on such-and-such a date and our score now reflects the new algorithm. No big deal.
But what if the algorithm had a fundamental error in it? Shouldn't you go back and revise all the data?
Consider my temperature example - what if I found that the thermometer in my house was actually off by 4 degrees? That it was actually 4 degrees colder outside that it was showing?
Wouldn't it make sense to go back and change all the historical readings for that sensor to be 4 degrees colder? (Assuming I could pinpoint the time at which it started being inaccurate... or just made the assumption that it had always been inaccurate.)
And yes... there's certainly a school of thought that says you should go back and revise history. The other school of thought would be to leave history alone and indicate that from this point forward the sensor data will now be more accurate.
It's obvious which school of thought Klout fits in.
Klout's Ecosystem "Problem"
The "problem" Klout has... and I put "problem" in quotes because it's the kind of "problem" any small startup would LOVE to have... is that they've had a lot of companies and developers using Klout's APIs to build other applications and systems that interact with Klout's metric. In fact, Klout is claiming over 3500 "partners and developers".
And you have to imagine that some % of those developers are engaging in tracking Klout scores over time. They want to track the trend of their own score... or their competitors score... or their clients' scores... or whatever.
All of that trend data just got rendered inaccurate.
It doesn't matter if Application X says that your client had a Klout score of 43 last week.... the official Klout database now says that the client's score was really 32... and it never was 43.
Oops. Now the application has "bogus" data.
Klout's Reporting Problem
Plus, if you were presenting reports or charts regularly to a client (or your management) showing them their Klout score, now you have to go back to the client and say "I'm sorry, but Klout revised their algorithm and you never had that score I told you."
You look like an idiot for trusting a metric that changes like this.
Of course, you're not alone, as Bob LeDrew so eloquently pointed out in his post yesterday "A Klout Upside The Head"... obviously many people are taking Klout's metric very seriously. (And way more seriously than I would even remotely consider.)
The fact that some people are using Klout's metric for business decisions would, in my mind, point to Klout needing to consider historical accuracy/integrity a bit stronger.
Sure, change the algorithm if you need to... but keep the history intact so that your partners and users don't look like idiots.
A Wake-up Call?
In the end will this kerfuffle make people be a little bit more critical of the Klout Score?
Will people realize it is only one of the metrics they should consider?
Will they take a look at other metrics that are emerging?
As the CEO of (Klout competitor) PeerIndex noted yesterday, there are many different ways of defining "influence"... and the market and all these companies are very young.
Will people realize that they shouldn't blindly rely on one simple metric?
While I'd love to believe people might - and we can only hope that at least some people will, I guess I'm cynical enough to think that people want nice, simple, easy metrics... and Klout is delivering that. Give it a few days for all this to blow over and sadly people will probably be right back caring about their Klout Score.
Only now perhaps they'll take occasional screenshots to be able to back up later claims about the score whenever Klout does its next revision of history...
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