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All posts tagged "reliability"


Thursday, July 22, 2010

AT&T Begrudgingly Releases Dropped Call Statistics

Posted by Michael Knutson in "Apple News" @ 10:00 AM

http://www.appleinsider.com/article..._call_data.html

"While Apple's chief executive Steve Jobs said AT&T wouldn't let him reveal its proprietary data about dropped call statistics for competitive reasons, the mobile provider has revealed some numbers in an effort to defend its network from poor dropped call scores collected by ChangeWave."

image(s) credit: CanStockPhoto

Very interesting article! Reminds me of the stories that I've heard and read about business metrics and statistics: "... we don't like these numbers that we're seeing; let's commission another company to collect information from subscribers to see how we're REALLY doing." AT&T wasn't particularly pleased with the results of a study from ChangeWave showing that their rate of dropped calls was higher than the competition. This was a survey of 4,040 smartphone users who were asked to report their own percentage of calls dropped. Is 4,040 users a statistically valid sample?

Another study contradicted this first set of results, and showed that AT&T's reliability was much, much closer to the industry leaders, or to use real world data, was a "difference of less than two (2) calls [dropped] out of 1,000." The study emphasized that location (cell tower proximity) is a major factor in call quality and reliability, so, the bottom line is that calls will get dropped, especially in areas of "lesser" coverage.


Monday, November 23, 2009

Apple Comes in Fourth

Posted by Jeff Campbell in "Apple Laptops" @ 08:00 AM

http://www.electronista.com/article...pple.4th.place/

"Apple is fairly reliable, but not the most reliable company of all when it comes to notebooks, according to a new study by research firm SquareTrade. The top honor goes to Asus, which surprised me, but I suppose shouldn't have when I consider the build quality of my fairly inexpensive Eee PC. Toshiba and Sony rank next most reliable, with Apple coming in a close fourth."

Netbooks suffer higher failure rates than regular or "premium" laptops however, failing 25.1%, 20.6% and 18.1% respectively over a three year period (the one year figures follow same pattern). They also note that overall, during a three year period, laptops in general will fail roughly 30% of the time because they are portable thus subject to more abuse either intentional or accidental.


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