What is central metaphor in Pega's model-driven approach?

In Pega's model-driven approach, the central metaphor revolves around a case and its life cycle. This concept emphasizes that work within the Pega platform is organized around cases, which represent business processes or transactions. Each case embodies all the necessary information, steps, and resources required to complete a specific business objective.

The focus on the case and its life cycle allows teams to visualize and manage the end-to-end process efficiently. This includes understanding the various stages a case goes through, from initiation to completion, as well as tracking progress, handling exceptions, and ensuring that all required actions and decisions are made along the way. By framing development and design work around cases, Pega enables a more intuitive and agile application development process, fostering collaboration between business stakeholders and development teams.

Other options may touch upon aspects of the system, such as user interfaces or business models, but they do not encapsulate the core principle of how Pega organizes and drives its processes. The project timeline is a tool for management but does not capture the iterative nature of business processes that the case life cycle represents. Therefore, the case and its life cycle are the most pivotal elements in Pega's model-driven approach.