Feature parity objective is to ensure that all the
existing features and functionalities within current
products are successfully replicated on new platform without any regression.
This is more important when organization wanted to retire
existing application, platform or product but wants to ensure that the new
system continue to meet the same expectation at a minimum.
Performance parity, in line with feature parity is to
ensure there is no performance degradation as features are moved to new
systems.
