Which diagram is the standard graphic representation used to model flows in an information system?

Introduction / Context:
Analysts use diagrams to visualize how an information system handles inputs, processes, data stores, and outputs. The data flow diagram is the standard notation for representing these flows at multiple levels of detail.

Given Data / Assumptions:

• We want a graphic view of how data moves through a system.
• The focus is on processes, external entities, data stores, and flows.
• We are not modeling program control logic or statistical distributions.

Concept / Approach:
A data flow diagram shows processes as circles or rounded boxes, external entities as squares, data stores as open ended rectangles, and arrows for data movement. Leveling allows context diagrams, level 1, and more detailed decompositions to keep complexity manageable.

Step-by-Step Solution:

Verification / Alternative check:
Flowcharts emphasize program control paths. Histograms display distributions. Pictograms are informal visuals. Only data flow diagrams purpose built model system information flows.

Why Other Options Are Wrong:

Common Pitfalls:
Mixing process steps with user interface screens and skipping data store definitions reduce clarity.

Final Answer:
Data flow diagram.