According to the BABOK Guide, the task of assessing organizational readiness involves analyzing the readiness, willingness, and ability of the stakeholders and the organization to accept, adopt, and use the solution1. This task requires inputs from various sources that provide information on the current and desired state of the organization, the solution scope and objectives, the stakeholder roles and responsibilities, and the potential impacts and risks of the change. Among the inputs listed in the question, the one that is not an input to the task of assessing organizational readiness is risk register. A risk register is an output of the task of identifying risks, which involves identifying and documenting the uncertainties that may affect the business analysis work or the solution2. A risk register is not an input to the task of assessing organizational readiness, but rather an input to the task of managing risks, which involves planning and implementing responses to the identified risks2.
The other options are all correct inputs to the task of assessing organizational readiness:
Enterprise architecture: Enterprise architecture is a description of the current and future structure and behavior of an organization’s processes, information systems, personnel, and organizational sub-units3. It provides an input to the task of assessing organizational readiness, as it helps to understand the alignment, dependencies, and gaps between the current and future state of the organization and the solution1.
Solution scope: Solution scope is a description of the boundaries of the solution, including what is in and out of scope, the key assumptions and constraints, and the major features and functions3. It provides an input to the task of assessing organizational readiness, as it helps to define the scope and objectives of the change, and the expected benefits and outcomes of the solution1.
Stakeholder concern: Stakeholder concern is a statement of a need, expectation, problem, or opportunity that is relevant to one or more stakeholders3. It provides an input to the task of assessing organizational readiness, as it helps to identify and analyze the stakeholder needs, expectations, interests, and attitudes towards the change, and the potential impacts and issues that may arise from the solution1. References:
1: BABOK Guide, section 6.2 Assess Organizational Readiness, page 116
2: BABOK Guide, section 4.7 Identify Risks, page 126; section 4.8 Manage Risks, page 130
3: BABOK Guide, section 3.8 Glossary, page 516-524