Consider a scenario where a decision is being made whether to invest $$100,000$ to prototype a project deliverable or to not prototype a project deliverable, instead proceeding to develop the final deliverable immediately. For each decision, the successful operation of the project deliverable, which is uncertain and represents a chance node, must be accounted for. If the project deliverable is successful, it is expected that the project will generate $$500,000$ in revenue. If no prototype is created, the likelihood of project deliverable failure is $80\%$ and the cost impact would be $$250,000.$ Since with a prototype, design changes can be implemented easier, the likelihood of a subsequent project deliverable failure is $30\%$ and the cost impact would be $$50,000.$