Driving out some reasonable outcome and designing good strategies can really help a business grow eventually. Business analysis is a long process and requires multiple skills and steps.
When a business analyst initiates to analyze a particular business it is suggested to go with an unstructured interview as this will play a role in analyzing the true requirements of a businessman or a stakeholder.
Once all the requirements and data are gathered. It should be thoroughly analyzed and reviewed well to drive out possible suggestions and changes.
Business Analysts are trained professionals who are able to bring and suggest those changes and strategies which can turn a slowly growing company into something rapidly growing one.