Flowchart

A type of node-link diagram used to represent a process, workflow, or algorithm as a sequence of steps connected by directional arrows. Flowcharts use conventional shape vocabularies (rectangles for process steps, diamonds for decisions, ovals for start/end) so that structure is conveyed by both shape and position. In accessibility research, flowcharts are a common test case for nonvisual diagram representation because they combine ordering, branching, and cycles — all structural properties that ALT text tends to flatten and that standardized screen reader tree navigation does not always express cleanly.