Which term best describes written notes added to drawings to explain materials, dimensions, functions and design decisions?

• A. Annotation
• B. Target market
• C. Primary research
• D. Orthographic drawing

Answer: (A)

Written notes added to drawings to explain materials, dimensions, functions and design decisions are called annotations. Annotations provide extra information that isn’t obvious from the drawing itself—like material specifications, finishes, tolerances, and the reasoning behind design choices—so everyone involved in manufacturing and quality can interpret and reproduce the item accurately. They help keep communication clear across design and production stages.

The other terms don’t fit because they refer to different ideas: target market is about who the product is for, primary research is about gathering data, and an orthographic drawing is a type of drawing showing views of the object rather than the descriptive notes themselves.