A fairly common English mistake I see on the part of ESL learners is the omission of articles. To avoid making this mistake, I tend to refrain from removing them if I'm not sure.
However, in a flow-chart style diagram, where concision is important, is it "more tolerable" to remove articles, similar to what some newspaper headlines do? More importantly, what "sounds" better to a native English speaker?
As an example, consider the two versions below:
Select a property -> Establish its status -> Find the origin of the property -> What is the origin? ---a human error---> Warn the user about it \-----a system error---> Create a log file
Select property -> Establish status -> Find origin of property -> What is the origin? ---human error---> Warn user about it \-----system error---> Create log file
The second seems clearer to me, does it feel like the articles are missing for a native speaker?
(Just before posting, I found out about Headlinese in this question, but it is not clear to me if the style is actually frowned upon or not; I'm mostly interested in the reader's perception of it, in diagrams inside scientific papers, for instance, where brevity is not as essential as in a newspaper.)