Opportunity cost refers to the value of the best alternative that is forfeited when a decision is made. Every resource deployed for one initiative is unavailable for others. Opportunity costs make this sacrifice visible and are therefore a central concept for strategic prioritization.
In practice, opportunity costs are frequently overlooked because they are invisible: what is not done attracts less attention than what is done. When a development team works on a new feature for six months, the opportunity costs are not just the salaries but above all the other features, improvements, or projects that could not be realized during that time. A CEO who spends time on operational details incurs opportunity costs in the form of strategic work that does not happen. The question is never just “Is this project worthwhile?” but “Is this project more worthwhile than everything else we could do instead?”
The concept comes from economic theory and is one of the most fundamental thinking tools for decisions under scarcity. It protects against the trap of evaluating projects in isolation rather than in the context of alternatives.