Figure 3
![Figure 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2105-12-351/MediaObjects/12859_2011_Article_4769_Fig3_HTML.jpg)
Components and mechanisms within the KEfED model. (A) Each model is made up of these elements (Activities, Objects, Variables and control flow elements). (B) A hypothetical example: showing multiple Objects, Activities and Variables. (C) The dependencies of variables in [B] based on pathways through the protocol. (D) Tabulated hypothetical data for the two measurement variables in this example.