According to the Capability in Business Analysis™ (CCBA®) guidelines, when multiple user groups are impacted by a proposed change, it is essential for the business analyst to establish a communication plan. This plan should detail how the changes will be communicated to the different user groups, ensuring that they understand the impact on their daily workflow. The communication plan typically includes information on the channels that will be used to disseminate the information, the timing of the communications, and the content that will be shared with each user group.

References: The importance of a communication plan in conveying changes to user groups is highlighted in the CCBA® learning documents, which can be found on the IIBA website12. Additionally, the IIBA Bookstore offers resources that provide further insights into the objectives and best practices for business analysis, including the establishment of effective communication plans