What are the shortcomings of the traditional waterfall based project management in IT projects?

How are IT project management different from other types of projects?

How agile software engineering practices help achieve the business goals of the project?

Some of these practices but not limited to are: -

Continuous integration / Continuous Delivery (CI/CD)

- Test Driven Development (TDD)

- Working Iteratively

- Feedback

- Managing the complexity of software development (Modularity - Cohesion - separation of Concerns)