Answer.

History of the issue: In large IT projects with multiple teams, the problem of coordinated design and uniform understanding of requirements arises — disparate teams tend to interpret business goals differently. Several approaches in system analysis have been developed to convey requirements and simplify inter-team interaction.

Problem: The main challenge is the synchronization of data, integration points, and interaction scenarios between teams, avoiding discrepancies in requirement interpretations, and the absence of "grey" zones in responsibility areas.

Solution: Key approaches include:

Formalization of interaction agreements (integration specifications, API contracts, and interface protocols);
Using a single repository for analysis artifacts (unified process descriptions, diagrams, requirements);
Conducting regular inter-team analytical sessions to demonstrate changes and resolve conflicts.

Key features:

The necessity of a unified terminology and standardized requirement templates.
Constant updating of artifacts is required (for instance, interaction schemes, Sequence Diagrams, IDD).
It is important to appoint a responsible analyst at the intersection of teams to harmonize requirements.

Tricky questions.

"Can Jira be fully trusted as the sole requirements management tool for team interaction?"

No, Jira is merely a tool for tracking tasks and dependencies; it does not guarantee the completeness and consistency of integration descriptions. Additional documentation and integration specifications are necessary.

"Is it mandatory for a system analyst to understand the architecture of all interacting services?"

No, deep architectural knowledge is not essential; it is important to understand business processes and integration points; if necessary, the analyst interacts with architects.

"Can tabular requirements be used solely for integration scenarios?"

No, tables alone are insufficient; schemas (for example, Sequence Diagrams, data flow diagrams) and textual descriptions of complex integrations are required.

Typical mistakes and anti-patterns

Ignoring regular reviews of integration scenarios between teams.
Different terminology in various teams.
Insufficient detailing of requirements at integration points.

Real-life example

Negative case: In a project for a bank, integration requirements between the mobile and web teams were only recorded in Jira tasks and oral discussions.

Pros:

Quick initial implementation.

Cons:

Regular misunderstandings, bugs during API updates, lack of documentation for new employees.

Positive case: In a similar project, the analyst created templates for integration specifications, conducted joint reviews, and appointed a responsible person at the junction. All new integrations are documented and agreed upon by the parties.