Systems analysis: A computer-assisted method used for recording and analyzing existing or proposed (hypothetical) systems—often through diagrams that trace how information moves—is called what?

Introduction / Context:
In systems analysis and design, analysts document how information moves between processes, data stores, and external entities. The computer-assisted method that emphasizes the movement of data through a system is the focus here.

Given Data / Assumptions:

• Objective is recording and analyzing an existing or hypothetical system.
• Method is commonly implemented with software tools.
• Emphasis is on flows and transformations of information.

Concept / Approach:

Data flow techniques (such as Data Flow Diagrams, DFDs) model processes, data stores, and data flows. CASE tools support creating these diagrams, validating consistency, and exploring 'what-if' scenarios for proposed systems.

Step-by-Step Solution:

Verification / Alternative check:

Typical artifacts include context diagrams (Level 0) and leveled DFDs that progressively detail processes and flows, exactly matching the described purpose.

Why Other Options Are Wrong:

• Data transmission: refers to communication over networks.
• Data processing: generic computation; not specifically a modeling method.
• Data capture: acquisition/entry of data.
• None: incorrect because 'Data flow' fits.

Common Pitfalls:

• Mixing up the modeling method (data flow) with implementation activities like processing or transmission.

Final Answer:

Data flow.