Definition: Cost benefit analysis(CBA),is a systematic approach to estimating the strengths and weaknesses of alternatives used to determine options which provide the best approach to achieving benefits while preserving savings
CBA may be used to compare completed or potential courses of actions, or to estimate( or evaluate)the value against the cost of decision, project ,or policy.
It is a process for evaluating the merits of a particular project in a systematic way in terms of cost and benefits of the project.