List and describe the four phases of the UP development methodology.

1 . Inception -- Develop an approximate vision of the system, make the business case,
define the scope, and produce rough estimates for cost and schedule.
2 . Elaboration -- Define the vision, identify and describe all requirements, finalize the
scope, design and implement the core architecture and functions, resolve
high risks, and produce realistic estimates for cost and schedule.
3 . Construction -- Iteratively implement the remaining lower-risk, predictable, and easier
elements and prepare for deployment.
4 . Transition -- Complete the beta test and deployment so users have a working system
and are ready to benefit as expected.