A small illustrative sketch. For the SEBoK, a vignette is a short implementation example written to become part of the SEBoK, where a case study introduction cites an existing, more extensive case study already available in the external literature. (Adapted from Webster's Online Dictionary)
Webster's Online Dictionary. s.v. "Vignette."
The base definition is from "Webster's Online Dictionary" at, http://www.websters-online-dictionary.org/definitions/vignette. The additional explanation was developed for SEBoK.. This definition describes the approach for vignettes in Systems Engineering Implementation Examples.