Final answer:
In the traditional project life cycle, after Concept Development comes the Planning phase, followed by implementation and finally the close-out. Effective planning, which leads to detailed design and implementation, is key to project success.
Step-by-step explanation:
In the traditional project life cycle, the sequence is Concept Development, Planning, Close-out. After developing a design concept, the next phase is planning where the detailed design work takes place. This involves selecting the best ideas from the research phase, creating plans and models, and then moving to implementation. During implementation, the project team may go through different steps like prototyping, testing, and refinement to achieve the desired results. It is critical to note that a detailed design has a considerable impact on the project's success. The ability to adapt and revise plans is essential through an ongoing, iterative process.