Final answer:
The next step in the selection process after a new system has been approved is to define requirements.
Step-by-step explanation:
After a new system has been selected and approved, the next step in the selection process is Define requirements. This step involves identifying the specific needs and constraints of the system. It is important to clearly define what the system must accomplish and any limitations or constraints that need to be considered. This helps ensure that the system is designed and implemented effectively.