Bazerman, M. H., and J. J. Gillespie. "Betting on the Future: The Virtues of Contingent Contracts." Harvard Business Review 77, no. 5 (September–October 1999): 155 ...
The owner contingency in this scenario is an amount set aside to cover any adjustments requested by the owner. With GMP (guaranteed maximum price) contracts, owner contingencies are frequently used.