Which is the better option for a systems

Are there advantages and disadvantages to using a formal methodology? Specifications should be utilized in software development for at least four reasons.

Is it best for a systems analyst to work using an integrated development environment (IDE) or with generic CASE tools? Explanation

What is the difference between structured, object-oriented, and agile techniques of development? Which approach, in your opinion, is the best?

As a software developer, what do you think the top four characteristics are that can be grouped together? When it comes to the software development lifecycle, how do you think the other four characteristics should be implemented?