Business analysis starts with stating the business goals. You then analyze the business problems you must solve and identify the business requirements that must be met to achieve the business goals. Consider also any business constraints that limit your ability to achieve the goals. The analysis of business requirements and constraints results in a set of business requirements documents.
You use the resulting set of business requirements documents as a basis for deriving technical requirements in the technical requirements phase. Throughout the solution life cycle, you measure the success of your deployment planning and ultimately the success of your solution according to the analysis performed in the business analysis phase.