Abstract: Operation and maintenance (O & M) activities are carried out to guarantee that the Gas Pipeline Infrastructure can operate reliably and safely. Estimated O&M Costs, which are used to generate the O&M budget for Routine, Non-Routine, and O&M Supporters, are based on a deterministic methodology, in which the components of the job and their costs are known. However, there are realizations of expenditures that have never been allocated, such as unforeseen work and handling of emergency conditions, as well as taking scheduled budget allocations for O & M activities, according to Company data for 2016-2019. These costs can be viewed as O&M Contingency Costs, which are costs that cannot be forecast or anticipated ahead of time but must occur.