Information Design 2

This entry is part 5 of 7 in the series Tracking Systems

God is in the details –Mies van der Rohe The primary function of an ED tracking system – at least if you look at it from the right direction – is to display relevant, timely data to the user. A tracking system may do other things, but this function of data display is arguably its […]



This entry is part 8 of 43 in the series Words

We all know what cryptography is: cryp·tog·ra·phy, n. 1.    the science or study of the techniques of secret writing, esp. code and cipher systems, methods, and the like. Cf. cryptanalysis (def. 2). 2.    the procedures, processes, methods, etc., of making and using secret writing, as codes or ciphers. 3.    anything written in a secret code, […]


Icons, Pedagogic Vectors, Forms Design and Posture

This entry is part 9 of 12 in the series Medical Computing

Icons and Pedagogic Vectors We all have trouble remembering a program’s graphical icons. The International Standards Organisation (ISO) has a standard for icons – an icon must be interpreted correctly by 2/3 of  test subjects. In usability and error-prevention terms, a 1/3 error rate is poor, but reality is even worse – an experimental study […]


Performance, Data Pixels, Location, and Preattentive Attributes

This entry is part 8 of 12 in the series Medical Computing

A good principle for medical software is to design for the ED as a worst-case scenario. If it works there, it will work anywhere.No clinicians are as time-pressured as those in a busy Emergency Department. There, distractions – even seemingly minor ones like presenting a complete CBC instead of an abstract – slow the clinician […]