A two-stage system is a process that involves two distinct phases to achieve a specific outcome. In many applications, such as manufacturing or data processing, the first stage typically prepares or transforms the input, while the second stage refines or finalizes the output. This separation allows for greater efficiency and control over each part of the process. For example, in a water treatment facility, the first stage may involve filtering out large particles, while the second stage uses chemicals to purify the water further. This structured approach helps ensure that each step is optimized for better overall results.