To easily grasp a time, measured as cycle time, tact time, etc., in what degree relating to an expected time.

A tact time is measured, and when this measured tact time leads to a plurality of preset compared values t1 to t5, corresponding each compared output (HH, H, PASS, L, LL) is outputted to a report means of a plurality of lamps, buzzers, etc., in the outside so as to be informed. In this way, a worker can recognize a work pace relating to a proper work pace, and the means can be utilized as a pace maker.