In an image formation method of an image formation apparatus for
correcting uneven image formation on the basis of vibration property
information corresponding to an operation sequence in image formation,
vibration property information corresponding to a plurality of operation
sequences are stored in a storage device. The uneven image formation is
corrected on the basis of vibration property information corresponding to
an operation sequence selected from the storage device. Vibration
property information generated by driving a movable member is measured
when the selected operation sequence is being executed while correcting
the uneven image formation. It is determined whether the measured
vibration property information is similar to the vibration property
information selected from the storage device. The vibration property
information stored in the storage device is rewrite-controlled in
accordance with the measurement result or the determination result.