Which approach aligns to approval of requirements at the end of a phase?

In business analysis, the predictive approach is characterized by its structured nature, where requirements are approved at the end of a phase or during planned change control meetings.  This approach is in contrast to adaptive approaches, which approve requirements more iteratively and as needed throughout the project lifecycle.  References : The information is consistent with the practices described in the BABOK Guide and other IIBA resources, which specify that predictive approaches typically involve approvals at the end of the phase 1 2 .