Opportunity Cost
Opportunity Cost
What Is Opportunity Cost?
- The value of the best alternative you give up
- Not in the books, so often left out of decisions
- The scarcest resource is usually people's time
Properly accounting for opportunity cost changes the very questions asked in meetings. The question moves from 'Is this project worth doing?' to 'What will we be unable to do if we take this on?' Because the approval standard rises from profitability alone to advantage over feasible alternatives, an expected profit is no longer enough to get a project signed off. What changes in practice is not a grand new system but one line in a document. If the approval form, beside the field that only listed 'assigned staff,' also asks for the project those people are currently on and the expected delay, the organization finally sees how limited its resources really are.
Each resource has a different opportunity cost, and the yardstick is substitutability. Cash can be borrowed or drawn forward, so it is relatively cheap. But six months of a seven-year engineer who knows how to run a particular piece of equipment cannot be filled even by hiring right away, which makes it the most expensive. In investment decisions, this value is converted into a hurdle rate. For a company whose cost of equity is 9%, a project with a 6% expected return is a loss from the shareholders’ point of view even if the books show a profit. The boundary on the other side is just as clear: development spending that has already been committed and cannot be recovered changes none of your future options, so it must be left out of the calculation. This is where sunk cost and opportunity cost part ways.
That is why a growing number of companies turn this concept into an operating rule rather than a formula. A typical approach is to cap the number of concurrent projects and drop one to add a new one. Tracking key people's available hours weekly and blocking new assignments once allocation passes a set threshold works on the same principle. What makes it stick is the form. A single line saying proposals that don't list candidates to stop or postpone are returned keeps what gets given up on record instead of lost in conversation.
The most common misconception in practice is the calculation that 'these people are on payroll anyway, so assigning them is free.' Labor cost may be a fixed cost, but that person's next three months are not. When this mistake shows up as concurrent-role assignments, ten pilots run at once, all miss their deadlines, and eventually no one is accountable. The opposite extreme is also risky: stretching opportunity cost without limit and putting decisions off because 'a better alternative might exist.' Limit the comparison to options that are feasible right now. Measured against an ideal alternative that doesn't exist, no proposal ever passes, and the longer review period piles up as opportunity cost again.
John KimAuthor of B2B Marketing Design and CEO of Nanum Consulting
Eunpyo HongExpert in company analysis, startups, and venture fundraisingIntroduced in the early 20th century by Austrian School economist Friedrich von Wieser, the concept offered a way to see the real cost of a choice, under resource scarcity, as the value of the alternative given up.
This is the story of Company A, an industrial parts manufacturer with 210 employees and annual revenue of about KRW 48 billion (≈ US$35,912,000) (hypothetical example). After management announced a smart factory transition, it launched 9 projects at once over a year, but only one was completed: equipment data collection. Even though KRW 400 million (≈ US$299,300) of the KRW 1.2 billion (≈ US$897,800) budget was still unspent, the only answer from the shop floor was 'we don't have the people.'
- When the head of corporate planning listed the staff on all 9 projects by name, 3 senior engineers in production engineering turned out to be double-booked on an average of 4.3 projects each. The report that reached the CEO read: 'The bottleneck isn't the budget. It's these three people.'
- The CFO suggested outsourcing the remaining KRW 400 (≈ US$1) million, but the answer came back that engineers who can work hands-on with the equipment PLCs simply can’t be hired on the market. Right there, it became clear which resources money cannot replace.
- The plant manager and five team leaders ran three rounds of 'If you could keep only three of these, which would you keep?' They kept just three projects, including reducing die-change time, halted four, and postponed two to the following year.
- Instead, they added a stop/postpone candidates field to the approval form for new projects, and set the system so that once a lead engineer’s allocation exceeds 80%, no new assignment can be made without the business unit head’s sign-off.
- Six months later, all 3 remaining projects were complete, and average lead time per project fell from 11 months to 5.5 months. Die-change time dropped from 42 minutes to 26 minutes, raising line utilization by 3.1 percentage points.