Do we need to stick on one methodology because in practical its not possible implement and be on one methodology

Do We Really Need to Stick to Just One Methodology?
I can confidently say this: we don’t need to rigidly stick to a single methodology.

In fact, methodological rigidity often clashes with the evolving, complex realities of today’s projects — especially in uncertain or fast-changing environments.

There’s a crucial difference between randomly mixing methods and strategically integrating approaches.
- Switching methodologies mid-project isn’t just possible — it can be highly effective.
But only if it's done intentionally, with sound governance, clear communication, and strong stakeholder alignment.
- When done well, a hybrid approach can harness the best of both worlds:
The predictability of Waterfall
The adaptability of Scrum
However, there are risks.
A common pitfall is what I call the "Frankenstein model" — stitching together practices from different methodologies without honoring their core principles.
This often leads to:
- Team confusion
- Erosion of trust
- Poor value delivery

To avoid this, consider these guiding principles:
- Reassess context and complexity
Use frameworks like Cynefin to determine if your domain is simple, complicated, complex, or chaotic — and adjust accordingly.
- Engage stakeholders and the team early
Methodological shifts impact how people work, decide, and deliver. Early alignment is key.
- Revisit roles, events, and artifacts
If you're adopting Scrum, respect the discipline — not just the ceremonies.
- Adapt — don’t blindly adopt
Success lies in thoughtful integration, not copy-paste frameworks.

The good news?
The modern project management paradigm — including the PMBOK® Guide (7th Edition) and PMI’s Agile Practice Guide — embraces principle-based, value-driven delivery, not rigid dogma.

So yes, evolving your methodology mid-project is not only acceptable — it can be a smart, strategic decision.
But it takes discipline, fluency, and most of all… human-centered leadership.

Because in the end, methodologies are not the goal.
Delivering value is.

You're absolutely right, Swet. In practice, many projects evolve into hybrid approaches—starting with a traditional waterfall structure and then incorporating Agile elements like Scrum to improve adaptability and delivery.

The key is to align the methodology with the project’s context and stakeholder needs. Methodologies are tools, not rules. If blending approaches leads to better outcomes without losing control or clarity, it's not only acceptable—it’s smart project management.

Real-world projects often demand flexibility. Starting with Waterfall and later blending in Scrum elements—like sprints for faster feedback—can drive better outcomes. The key is choosing what fits the team, goals, and context, not forcing a rigid method.