A project sponsor is adamant that a complex project must be completed within 12 months. Based on lessons learned from previous projects of this type, the project manager believes that the project…

A project sponsor is adamant that a complex project must be completed within 12 months. Based on lessons learned from previous projects of this type, the project manager believes that the project cannot possibly finish in less than 24 months. Which of the following tools can the project manager use to show the improbability of the proposed timeline?