investigating the operating budget of foreign oil companies (case study: national iranian oil company)

The present research is aimed at verifying the operational budget of foreign oil companies (case study: national iranian oil company). the statistical population of the present study is the national iran oil company, and subject to lack of samples the population of the study is conducted with all national iranian oil company’s subsidiaries that operate abroad are studied. to collect the necessary information and statistics, a questionnaire method was used for hard data, as well as a sample of the conducted studies, also competent authorities references were used for soft data. to carry out this research, at first, the significance of the variables was checked using the generalized dickey-fuller test, and after determining the degree of significance of the variables, the arfima method was used to determine the model of operational budgeting. to estimate the research model, eviews 10 software was used. the results of the research analysis showed that political risk and inflation have a negative and significant impact on the operating budget of the company and reduce the efficiency of resources. also, the increase in environmental and organizational variables causes budgeting based on the intrinsic price of crude oil. finally, the results of the research showed that variables such as the behaviour of competing companies and financial support as variables of structural failure in the operational budgeting model have a significant impact.