{"id":3551,"date":"2012-02-01T20:23:41","date_gmt":"2012-02-01T10:23:41","guid":{"rendered":"http:\/\/nsrd.info\/blog\/?p=3551"},"modified":"2012-02-01T20:23:41","modified_gmt":"2012-02-01T10:23:41","slug":"aside-indeterminate-measurements-and-false-hope","status":"publish","type":"post","link":"https:\/\/nsrd.info\/blog\/2012\/02\/01\/aside-indeterminate-measurements-and-false-hope\/","title":{"rendered":"Aside \u2013 Indeterminate measurements and false hope"},"content":{"rendered":"

\"Percentage<\/a><\/p>\n

I’d like to suggest that we should specify that “percentage complete” estimates \u2013 be they progress bars or sliders or any other representation, visual or textual, need a defined unit of measurement to them.<\/p>\n

And we should define that unit of measurement as a maybe<\/em>.<\/p>\n

That is, if a piece of software reports that it is 98% complete at something, that’s 98 maybes out of a 100.<\/p>\n

I perhaps, should mention, that I’m not thinking of NetWorker when I make this case. Indeed, it’s actually springing from spending 4+ hours one day monitoring a backup job from one of NetWorker’s competitors. A backup job that for the entire duration was at … 99% complete.<\/p>\n

You see, in a lot of software, progress indicators just aren’t accurate. This lead to the term “Microsoft minute”, for instance, to describe the interminable reality bending specification of time remaining on file copies in Microsoft operating systems. Equally we can say the same thing of software installers; an installer may report that it’s 95% complete with 1 minute remaining for anywhere between 15 seconds and 2 hours \u2013 or more. It’s not just difficult to give an upper ceiling, it’s indeterminate.<\/p>\n

I believe that software which can’t measure its progress with sufficient accuracy shouldn’t give an actual percentage complete status or time to complete status without explicitly stating it as being an estimate<\/em>. To fail to do so is an act of deceit to the user.<\/p>\n

I would also argue that no software<\/em>\u00a0can\u00a0measure its process with sufficient accuracy, and thus all<\/em>\u00a0software should provide completion status as an estimate<\/em>\u00a0rather than a hard fact. After all:<\/p>\n