When it comes to managing the portfolio value, one of the junior portfolio managers came to you asking about the relation between cost-benefit analysis and the efficient frontier analysis. What should

The efficient frontier analysis is not a subordinate tool used within cost-benefit analysis; they are separate but complementary techniques applied independently to inform portfolio investment decisions.

Efficient frontiers are not static - they shift as organizational priorities, resource constraints, and market conditions evolve over time. Because the frontier changes, organizations must continuously monitor cost-benefit ratios to ensure the portfolio remains optimally positioned, making ongoing monitoring the correct characterization of how these two analyses relate in practice.

The efficient frontier does not primarily track realized value against planned costs - it represents the optimal set of portfolio investments offering the best expected return for a given level of risk or investment.

While cost-benefit analyses are indeed dynamic, organizations monitor efficient frontier positions - not cost-benefit frontier ratios - making this answer technically inaccurate in its framing of the relationship.