What methodology emphasizes writing software with planning needed for developing the product?

The methodology that emphasizes writing software with the planning necessary for developing the product is the Waterfall model. This approach is characterized by a linear and sequential design process that follows distinct phases, such as requirement analysis, system design, implementation, testing, deployment, and maintenance. Each of these phases requires careful planning and documentation before proceeding to the next step, ensuring that each part of the project is thoroughly considered and executed. This structured approach is particularly beneficial for projects with clearly defined requirements and objectives, as it mitigates the risk of changes during the development process.

While methods like Agile focus on flexibility and iterative improvements, and Rapid Application Development emphasizes speed over extensive planning, the Waterfall model stands out for its disciplined approach to planning and executing the software development lifecycle.