What is cost-volume-profit (CVP) analysis, and how is it used for decision making?

Accounting

What is costvolumeprofit (CVP) analysis, and how is it used for decision making?
Q2: How are CVP calculations performed for a single product?
Q3: How are CVP calculations performed for multiple products?
Q4: What assumptions and limitations should managers consider when using CVP analysis?
Q5: How are the margin of safety and operating leverage used to assess operational risk?