Final answer:
A cost-benefit analysis allows a department to assess its cost-effectiveness within an organization by quantifying the costs and benefits.
Step-by-step explanation:
A department can assess its cost-effectiveness within an organization by conducting a cost-benefit analysis. This process involves comparing the costs incurred by the department with the benefits it generates in terms of money, time, experience, and other improvements. By quantifying the costs and benefits, the department can determine its overall effectiveness and make informed decisions.
Option 3: Cost-benefit analysis is the correct answer as it directly aligns with the process of assessing cost-effectiveness within an organization.