Post-implementation reports are formal reports or audits of a project after it is up and running.

Plunge implementation discards the legacy system completely and immediately migrates all users to the new system.

Loose coupling is the capability of services to be joined together on demand to create composite services, or disassembled just as easily into their functional component.

Discovery prototyping builds a small-scale representation or working model of the system to ensure that it meets the user and business requirements.

Information system control reports ensure the reliability of information, consisting of policies and their physical implementation, access restrictions, or recordkeeping of actions and transactions.

What verifies that the units or pieces of code function correctly when integrated together?

A dependency is a logical relationship that exists between the project tasks, or between a project task and a milestone.

A kill switch is a logical relationship that exists between the project tasks, or between a project task and a milestone.

User acceptance testing tests individual units or pieces of code for a system.

The rational unified process (RUP) methodology, owned by IBM, provides a framework for breaking down the development of software into four gates.