Assessing an article is very similar to reviewing a book. The main difference is that the research questions addressed in an article are often more specific than in a book.
Relevance
Connection to question and purpose
Does the information answer the questions you have?
Does the information match the questions you have and/or the target audience you are writing for?
Does an article as a form of information match your information needs?
Completeness
Does the article give a complete picture. Are more sources needed?
Topicality
Given your research, how current should the information be?
What is the year of publication?
Can you expect more recent developments in the meantime?
If other sources are referenced; how recent are they?
Reliability
Authority
Who is the author and what authority does he or she have?
What is the author's background?
Has the author published anything before?
Does the author belong to a research institution or organization?
With what intention did the author write the article?
Has the article undergone peer review?
Is the article cited by other scientists?
Correctness
Are the facts in the article correct?
Are opinions substantiated?
Objectivity
Is the information presented objectively
Does the article contain mostly facts or opinions?
What is the purpose of the article? Informational, opinion, entertainment, commercial....
Journal quality
How does it look, by whom is it published?
Verifiability
Are the facts or data verifiable?
Are the source citations correct? What are the sources?