When should a portfolio manager use cost-benefit analysis?

Limiting cost-benefit analysis to stage-gate reviews restricts a critical analytical tool to predetermined checkpoints, ignoring the continuous nature of portfolio management decision-making.

Using cost-benefit analysis only during financial budget planning narrows its application to one planning cycle and excludes its use in component selection, reprioritization, and performance decisions.

Portfolio management is a dynamic, ongoing process where components are continually evaluated, reprioritized, and adjusted based on changing organizational needs and strategic conditions. Cost-benefit analysis is used throughout the portfolio lifecycle to assess new component proposals, evaluate ongoing components, justify resource allocation changes, and support go/no-go decisions at any point. Restricting its use to specific events or activities would deprive the portfolio manager of a key analytical tool during the many decision points that arise outside of formal reviews.

Applying cost-benefit analysis only when reporting on performance metrics is reactive and misses its value as a proactive tool for ongoing portfolio optimization and investment decisions.