U+- Bank, a retail bank, has recently Implemented a project in which qualified customers see mortgage offers when they log in to the web self-service portal.

Currently, only the customers who satisfy the following engagement policy conditions receive the Fifteen-year fixed-rate mortgage offer:

The bank decides to make two changes:

1. Update the suitability condition for the Fifteen-year fixed-rate mortgage offer.

2. Introduce a new offer, Twenty-year fixed-rate mortgage.

The following table shows the new engagement policy conditions for both mortgage offers:

What is the best practice to fulfill this change management requirement in the business operations environment?