Refer Case 5-1, the Barrage Construction Company, in Chapter 5.

In the case, the project manager Sean Shawn employed the analogy method with an adjustment to estimate the cost of constructing a three-car garage. Specifically, he started with the cost of an average two-car garage, $143,000, and increased it by 50 percent to $214,500. Comment on the accuracy of the three-car garage estimate.

Suggest a different approach that would probably yield a more accurate cost estimate, then use this approach and made-up time and cost figures to compute the estimate. Argue why your estimate is better than Sean ’ s.

Figure 8-20 is Sean ’ s WBS.