TY JOUR TI VALUE ANALYSIS AS A METHOD OF INCREASING THE EFFICIENCY OF BUSINESS PROCESSES OF OIL COMPANIES KW functional-cost analysis KW methodology of functional-cost analysis KW business processes KW oil and gas companies KW geological survey KW economic efficiency JO Vestnik of Astrakhan State Technical University. Series: Economics AU Tarasova, A.. AU Karlina, E.. PY 2018 IS PB Astrakhan State Technical University