Commitments are, by definition, conditional due to factors beyond the control of the parties to an agreement. Next-level management may change their priorities. The customer could modify their requirements. Available resources – people, time, budgets – are often redeployed on short notice.
Caveat: is a warning or proviso of specific stipulations, conditions or limitations. In law, a caveat is a notice that certain actions may not be taken without informing the person who gave the notice. “Caveat” originates in the mid 16th century and is derived from Latin, literally from “let a person beware.”
Contingency: Event (as an emergency that may, but is not certain to occur); trying to provide for every contingency; something liable to happen as an adjunct to or result of something else. From Latin contingent-, contingens: to have contact with, befall, from com- + tangere to touch; first Known Use: 14th century.