NOVELTY - A process (m1) for controlling the simultaneous production of diesel component and aviation component from renewable feedstock involves identifying target specifications required for the components; determining yields required for the components that meet the target specifications; determining a mixture of at least two renewable feedstocks where the components meet the specifications; mixing the feedstocks; hydrogenating and deoxygenating the mixture to provide effluent comprising n-paraffins; isomerizing to generate branched-paraffins; and fractionating to provide two different streams.    USE - For controlling the simultaneous production a hydrocarbon product stream having hydrocarbons with boiling points in the diesel and aviation fuel range from renewable feedstocks (claimed) originating from plants or animals other than petroleum feedstocks.    ADVANTAGE - The hydrocarbon product can be adjusted by selecting the feedstocks with appropriate fatty acid carbon chain distributions, without requiring different process equipment, more severe processing, and/or production of increased levels of lower value side products. The process allows an operator to select the specific type of aviation fuel or blending component, and diesel fuel or blending component to be produced and thus the specifications of the fuels/components and the relative yields of each so long as the yields selected allow the fuel specifications to be met. The process provides operators with a great deal of flexibility without large changes in the process or process severity. Different grades of fuels may be produced at different times as the market demands change, and the relative yields of the diesel component and the aviation component may be changed with market demands, as well. Feedstock availability and pricing may also result in a need to control the process. The process can be adjusted as needed to accommodate changing requirements for different fuel specifications or yields.    DETAILED DESCRIPTION - A process (m1) for controlling the simultaneous production of a diesel component comprising hydrocarbons having boiling points in the diesel fuel range and an aviation component comprising hydrocarbons having boiling points in the aviation fuel range from a renewable feedstock involves identifying target specifications required for the diesel component and for the aviation component; determining yields required for the diesel component and for the aviation component that meet the target specifications; determining a mixture of at least two renewable feedstocks that results in the predetermined yields required for the diesel component and for the aviation component where the diesel component and the aviation component further meet the identified specifications; mixing the at least two renewable feedstocks to form the mixture; hydrogenating and deoxygenating the mixture by contacting the mixture in a hydrogenation and deoxygenation zone with a hydrogenation and deoxygenation catalyst at hydrogenation and deoxygenation conditions to provide a hydrogenation and deoxygenation zone effluent comprising n-paraffins; isomerizing at least a portion of the n-paraffins in the hydrogenation and deoxygenation zone effluent by contacting the n-paraffins with an isomerization catalyst in the presence of hydrogen at isomerization conditions in an isomerization zone to generate branched-paraffins in an isomerization zone effluent; and fractionating the isomerization zone effluent to provide a first product stream comprising the diesel component and a second product stream comprising the aviation component at substantially the predetermined yields and target specifications. An INDEPENDENT CLAIM is included for a diesel fuel or diesel fuel blending component and an aviation fuel or aviation fuel blending component as produced by the process (m1).