Chapter 13 Visual Communication: Drawings, Renderings, and Models 439 Copyright Goodheart-Willcox Co., Inc. ■ Concept. A simplified sketch—or concept sketch (sometimes called an ideation sketch)—illustrates a concept often with arrows leading to labels or short phrases that explain the concept. A designer uses concept sketches mostly commonly in the ideation process during Schematic Design phase. See Figure 13-11. Image by Jacqui McFarland Figure 13-11 A designer uses a concept sketch during the ideation process. The use of words or phrases with arrows help explain the concept. ■ Storyboard. A storyboard is a series of square- or rectangular-thumbnail sketches that tell a story through sequential development. Designers sometimes use them to illustrate an idea or develop a presentation sequence for use with a client, Figure 13-12.