Answer.

Requirements modeling is one of the standard stages of a business analyst's work. The use of UML (Unified Modeling Language) and BPMN (Business Process Model and Notation) notations allows:

Standardize the description of processes for different stakeholders
Visualize complex scenarios, facilitating a shared understanding between the client and the team
Ensure consistency in documentation and the possibility of automatic artifact generation

UML is often used to describe use cases, classes, activities, while BPMN is used for step-by-step logic or routes of business processes.

The choice of format depends on the target audience, complexity of the process, regulatory requirements and other factors. Sometimes it is appropriate to combine both approaches.

Key features:

Unification of documentation through the use of standard notations
Ensuring clarity of requirements
Simplifying communication between the technical team and the business

Tricky questions.

Is it possible to describe all requirements exclusively in freeform text?

No. Free-form text inevitably leads to ambiguity, misunderstandings and communication losses between teams. Standardized diagrams increase accuracy and transparency.

Is UML suitable for modeling user business processes from start to finish?

Not always. UML is better suited for designing system structure and behavior, while BPMN is specifically intended for modeling business processes.

Can all project stakeholders fully understand BPMN or UML diagrams?

No. Some stakeholders without a technical background may struggle with reading complex diagrams. This requires additional facilitation and explanations.

Common mistakes and anti-patterns

Incorrect choice of notation for a specific task
Documenting only in text form while ignoring visual aids
Too complex or confusing diagrams without explanations

Real-life example

Negative case:

The analyst described the process entirely in a Word document without visualizing diagrams.

Pros:

Easy to maintain simple requirements

Cons:

The development team misunderstood the sequence of processes, resulting in bugs and shortcomings

Positive case:

The analyst uses BPMN and UML for key processes, adding detailed explanations to the diagrams.