The construction team is building a new design for their company and the market for the product is extremely unstable because of current interest rates. According to the site manager, a key to success will be to have an extremely accurate estimate of the resource needs for the project, especially because the company is resource constrained. Which type of duration estimating approach is the most accurate?

a. Parametric estimating

b. Bottom-up estimating

c. Analogous estimating

d. Fast tracking