Nor is it possible to predict, with accuracy, the fluctuating bid climate and related market conditions that may exist throughout the life of a long project. As decisions were made and conditions evolved on the Big Dig, however, B/PB factored them into its cost assessments and kept the client fully informed, even in the face of strong political pressures.Cost Control: B/PB made an original cost estimate in the early 1980s, not accounting for inflation. Over time, inflation increased the cost of resources needed for the project. Leading to a significant underestimation of the project's final cost. What could of help this cost control was an integrated process approach