Links: 1-6-2013

What I learned going back to UX school
Data driven usability questions: "People throw around sayings like “Easy to Use” or “Intuitive” but without some data those are merely opinions. When it comes to measuring ease of use, there are well established things to track: Success rate: What percent of users can even do the thing its supposed to let them do. Often this is well below 100%. Time on task: how long does it take users to do the thing it supposed to do. Better designs take users less time. Error rates: how many mistakes or confusions does the user have."
(categories: ux usability-testing usability testing data metrics )
Numbers Every Programmer Should Know By Year
Ran into this a couple weeks ago when onsite with a customer and was seeing 3ms for a "file.exists" type of operation when inside of a VM which was about 100x slower than corresponding VM’s in our own infrastructure.
(categories: architecture performance programming systems speed )
How To Run a 5 Whys (With Humans, Not Robots)
Quote: "Which is the Root Cause? DB access bug or monitoring failure? Answer: don’t care about "root causes”. They don’t exist (multiple things conspire for failures to happen). Also, kind of moral/blame-ish. Ask instead: if we made an incremental improvement in area A or area B , which would prevent the broadest class of problems going ahead? Much better conversation… Remember, There Is No Axe Murderer (Probably)."
(categories: management process rca root-cause-assessment )
Custom T-Shirts – Design Your Own T-Shirts Online – Free Shipping!
Great custom t-shirt site.
(categories: t-shirts design )

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Links: 1-6-2013

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