There is disclosed an apparatus for supporting evaluation of usability of
an instrument relative to performing a given task. During performing of
the task, a control unit acquires information of an operation log related
to an operation performed by a user, and evaluates an effectiveness index
associated with achievement of the task, efficiency index associated with
efficiency, and satisfaction index associated with subjective satisfaction
of the user. The indexes are generated by a statistical calculation using
a plurality of measured items, including the operation log information.
