October 2012

In the first post in this series, I introduced basic Petri net terminology and symbols.  Today’s post looks closer at modeling state using Petri nets.  The primary care office model in the first post illustrated straightforward movement by patients from waiting to checked-out.   While this model does capture the essence of what occurs in practices, […]


Well, it has taken longer than expected, but it’s time to discuss Petri nets.   This is the first post in a series that will look at this remarkable tool.  I am enamored with Petri nets because they provide an elegant solution to a range of problems I have encountered during software design and implementation.  Here […]

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EHR selection and implementation, usability, and software design all share a common set of goals, the most important of which are ensuring that users are productive and that patients receive quality care.   Workflow analysis as an adjunct to system selection and implementation is old news (1).  Perhaps, the recent ground swell of interest in usability […]


The EHR as an Object Worthy of Study

by Jerome Carter on October 8, 2012 · 0 comments

It isn’t often that I come across an article that truly resonates with me, but Next-Generation Phenotyping of Electronic Health Records, by Hripcsak and Albers, did just that.   While the authors’ main focus is EHR data quality, they make this intriguing observation/suggestion: It will require study of the EHR as if it were a natural […]


Recently, while reviewing visits to EHR Science, I noticed that the number of people accessing the Usability resources page has jumped.   Now that EHR adoption is moving along, usability has gained a much higher profile, both from the ONC as a certification requirement (EHR Certification 2014—Darwinian Implications?) and from users interested in buying systems that […]