A mounting management device managing a component mounting apparatus which includes component mounting means for picking up and mounting a component on a board using a nozzle from a component supply tape that is fed out to a component supply position, a tape feeder that has a reel holding section that is configured to hold to be rotatable a reel around which the component supply tape is wound and a feeder section that is configured to feed out the component supply tape that is unwound from the reel to the component supply position, and a feeder setting base on which a plurality of slots into which the tape feeders are installable are lined up in one row, the mounting management device comprising: installation position setting means for setting an installation position of a plurality of the tape feeders having the same or different width which are configured to be installed on any slot of the feeder setting base, wherein at least one of the plurality of the tape feeders of the component mounting apparatus is a variable tape feeder, wherein the reel holding section is connected to the feeder section and is displaceable in a tape width direction to a predetermined displacement amount with respect to the feeder section in which the reel holding section has a wider width than the feeder section,and in a case where at least one of adjacent tape feeders is the variable tape feeder, the installation position setting means is configured to set an installation position considering the predetermined displacement amount of the variable tape feeder such that the adjacent tape feeders do not interfere with each other, wherein the installation position setting means, in a case where at least one of adjacent tape feeders is the variable tape feeder, is configured to determine whether or not the reel holding sections interfere with each other without displacement in a state where a temporary installation position is set such that the feeder sections of the adjacent tape feeders do not interfere with each other, if there is no interference, to set the temporary installation position as the installation position, if there is interference, to determine whether or not it is possible to avoid interference by displacing the reel holding section of the variable tape feeder by setting the predetermined displacement amount as an upper limit, if it is possible to avoid interference, to set the temporary installation position as the installation position, and if it is not possible to avoid interference, to update the temporary installation position of each tape feeder such that a gap between both positions widens. installation position setting means for setting an installation position of a plurality of the tape feeders having the same or different width which are configured to be installed on any slot of the feeder setting base, wherein at least one of the plurality of the tape feeders of the component mounting apparatus is a variable tape feeder, wherein the reel holding section is connected to the feeder section and is displaceable in a tape width direction to a predetermined displacement amount with respect to the feeder section in which the reel holding section has a wider width than the feeder section,and in a case where at least one of adjacent tape feeders is the variable tape feeder, the installation position setting means is configured to set an installation position considering the predetermined displacement amount of the variable tape feeder such that the adjacent tape feeders do not interfere with each other, wherein the installation position setting means, in a case where at least one of adjacent tape feeders is the variable tape feeder, is configured to determine whether or not the reel holding sections interfere with each other without displacement in a state where a temporary installation position is set such that the feeder sections of the adjacent tape feeders do not interfere with each other, if there is no interference, to set the temporary installation position as the installation position, if there is interference, to determine whether or not it is possible to avoid interference by displacing the reel holding section of the variable tape feeder by setting the predetermined displacement amount as an upper limit, if it is possible to avoid interference, to set the temporary installation position as the installation position, and if it is not possible to avoid interference, to update the temporary installation position of each tape feeder such that a gap between both positions widens.