Answer.

The choice of implementation methodology depends on many parameters: the maturity of the client, the degree of certainty of requirements, the capabilities of the team, the criticality of deadlines, and budget constraints.

• Waterfall is applied when the requirements are clear and stable from the beginning, and the project is strictly regulated (for example, government tenders, large integration solutions for corporate clients).

• Agile is chosen if significant changes are possible during the implementation, and the client is ready for iterative delivery of value and constant refinements.

The analyst evaluates:

• The rigidity of deadlines and budget.
• The experience and flexibility of the team.
• The clarity of the final goal and completeness of the requirements.
• Requirements for transparency of the work process for the client.

Key features:

• The methodology affects the ways of gathering, detailing, and managing requirements.
• In Waterfall, a detailed SRS is required at the start.
• In Agile, the analyst maintains the Product Backlog and supports iterative work with requirements.

Tricky Questions.

Can the analyst completely change the methodology in the middle of the project?

No, transitioning requires reengineering the working model, which is costly and risky. More often, elements of both approaches are mixed.

Is Agile always faster than Waterfall?

No, Agile does not guarantee quick results if the client is not engaged in the process and there is no culture of change.

Are all projects ideal candidates for Agile?

No, for projects with fixed requirements and high risk of regulatory penalties, Agile is not always suitable.

Common Mistakes and Anti-Patterns

• Blindly copying Agile without considering client and team maturity.
• Incomplete documentation of requirements when working with Waterfall.
• Lack of flexibility in the face of changes.
• Overburdening with documentation during Agile implementation.

Real-Life Example

Negative Case: In a corporate project, Scrum was attempted to be implemented without experience and client involvement; requirements changed chaotically, and the final deadline was missed.

• Pros: there are elements of flexibility, quick decision-making on minor issues.
• Cons: constant rework, budget and deadline overruns.

Positive Case: In a startup project, Kanban was implemented, the client participated in task prioritization, requirements changed through the Product Backlog, and constant delivery of useful updates occurred.

• Pros: flexibility, high client satisfaction, fast time-to-market.
• Cons: time is required for training the role of Product Owner and getting the client involved in team processes.