As you asked here I am telling that Business analysis is a research discipline of identifying business needs and determining solutions to business problems, Solutions which often include a software-systems development component.

Process for Business analysis
Starting Point
Designate Business Analysis Team:
Identify Current Business Process:
Identify Stakeholders
Identify Requirements

Techniques used Business analysis
PESTLE
The six attributes of PESTLE:
Political (current and potential influences from political pressures)
Economic (the local, national and world economy impact)
Sociological (the ways in which a society can affect an organization)
Technological (the effect of new and emerging technology)
Legal (the effect of national and world legislation)
Environmental (the local, national and world environmental issues)


Heptalysis
Market opportunity
Product/solution
Execution plan
Financial engine
Human capital
Potential return
Margin of safety

STEER

It is an analysis that puts into consideration - the following
Socio-cultural
Technological
Economic
Ecological
Regulatory Factors