Understand the stakeholders’ business processes and needs using various elicitation techniques such as storyboarding, brainstorming, prototyping, etc.

Capture the domain vocabulary in a glossary document to maintain consistent semantics for communication.

Develop a high-level use case model.

Understand user usability requirements from the end users the system.

Identify the critical use cases that drive architectural and planning decisions.

Explore different candidate architectures to determine feasibility and evaluate
trade-offs in design.

Major technical risks such as new technologies, algorithmic complexity, integration or performance constraints are evaluated and prototyped, if necessary.

Exhibit, and possibly demonstrate, at least one candidate architecture against some of the critical scenarios.

Identify the use cases that are tied to the BSMs and ROI.

Select the system requirements from the available candidate requirements, using inputs from stakeholders, BSMs and the estimates.

Check the system requirements for correctness, consistency, feasibility and verifiability.

Develop an initial scope document.

Identify risks and develop an initial risk assessment/management plan.