A computer implemented method of generating a conformance problem index value for identifying a conformance candidate for a flood operation on a hydrocarbon reservoir, the method comprising: for a first entity: solving an injection entity index to generate an injection entity index, IEI, value, wherein the injection entity index includes injection efficiency, value of injected fluid, and pore volume injected for a period of time; solving a production entity index to generate a production entity index, PEI, value, wherein the production entity index includes estimate of remaining movable oil in place; evaluating an operation entity index that represents operation status to generate an operation entity index, OI, value; and combining the injection entity index, IEI, value, the production entity index, PEI, value, and the operation entity index, OI, value to generate a conformance problem index, CPI, value for the first entity, according to CPI = IEI * PEI * OI, wherein: the IEI value is defined by IEI = (1-fij)* VOIFij / PVIi, where fij represents the connectivity between a particular injection entity i and production entity j pair, VOIFij is the value of injected fluid obtained between a particular injection entity i and production entity j pair, and PVIi is the pore volume injected for an injection entity i; the PEI value is defined by PEI = 1- RF@1PVI, where RF@1PVI is a recovery factor estimate at one pore volume injected; and the OI value is a value which represents whether a given production or injection entity is available, and wherein the method further comprises comparing the generated conformance problem index value for the first entity and a threshold to determine if the first entity is a conformance candidate. for a first entity: solving an injection entity index to generate an injection entity index, IEI, value, wherein the injection entity index includes injection efficiency, value of injected fluid, and pore volume injected for a period of time; solving a production entity index to generate a production entity index, PEI, value, wherein the production entity index includes estimate of remaining movable oil in place; evaluating an operation entity index that represents operation status to generate an operation entity index, OI, value; and combining the injection entity index, IEI, value, the production entity index, PEI, value, and the operation entity index, OI, value to generate a conformance problem index, CPI, value for the first entity, according to CPI = IEI * PEI * OI, solving an injection entity index to generate an injection entity index, IEI, value, wherein the injection entity index includes injection efficiency, value of injected fluid, and pore volume injected for a period of time; solving a production entity index to generate a production entity index, PEI, value, wherein the production entity index includes estimate of remaining movable oil in place; evaluating an operation entity index that represents operation status to generate an operation entity index, OI, value; and combining the injection entity index, IEI, value, the production entity index, PEI, value, and the operation entity index, OI, value to generate a conformance problem index, CPI, value for the first entity, according to CPI = IEI * PEI * OI, wherein: the IEI value is defined by IEI = (1-fij)* VOIFij / PVIi, where fij represents the connectivity between a particular injection entity i and production entity j pair, VOIFij is the value of injected fluid obtained between a particular injection entity i and production entity j pair, and PVIi is the pore volume injected for an injection entity i; the PEI value is defined by PEI = 1- RF@1PVI, where RF@1PVI is a recovery factor estimate at one pore volume injected; and the OI value is a value which represents whether a given production or injection entity is available, and wherein the method further comprises comparing the generated conformance problem index value for the first entity and a threshold to determine if the first entity is a conformance candidate. the IEI value is defined by IEI = (1-fij)* VOIFij / PVIi, where fij represents the connectivity between a particular injection entity i and production entity j pair, VOIFij is the value of injected fluid obtained between a particular injection entity i and production entity j pair, and PVIi is the pore volume injected for an injection entity i; the PEI value is defined by PEI = 1- RF@1PVI, where RF@1PVI is a recovery factor estimate at one pore volume injected; and the OI value is a value which represents whether a given production or injection entity is available, and wherein the method further comprises comparing the generated conformance problem index value for the first entity and a threshold to determine if the first entity is a conformance candidate.