What is used to represent decisions in a model related to decision-making elements?

The correct choice, Decision Modelling, serves as a method specifically designed to effectively represent decisions within a system or process. This modeling technique provides a structured approach to illustrate how decisions are made, the criteria influencing these decisions, and the potential outcomes based on different scenarios. It captures various decision-making elements, allowing stakeholders to clearly understand the logic and rules governing decision processes.

Decision Modelling contributes to enhanced clarity in requirements analysis by visually laying out the pathways and conditions that lead to specific decisions, which can be especially valuable in complex environments. This visual representation helps in identifying potential bottlenecks, opportunities for optimization, and ensures alignment across business stakeholders regarding decision-making criteria.

The other options, while relevant in their contexts, do not focus on representing decisions specifically. Data Flow Diagrams primarily visualize the flow of data within a system rather than decision-making paths. Business Rules Analysis deals with identifying and documenting the rules that govern business operations but does not inherently illustrate the decision process itself. A Glossary serves as a reference for terminology and definitions but does not play a role in modeling decisions or illustrating how decisions are reached.