The cost of micromotion study limits its use to repetitive activities, where even minor improvements can yield substantial savinge owing to the number of times an operation is repeated, or where other considerations justify its use (e.g., surgical procedures).
Motion study analysts often use charts as tools for analyzing and recording motion studies. Activity charts and process charts such as those described earlier can be quite helpful. In addition, analysts may use a simo chart (see Figure 7.4) to study simultaneous motions of the hands. These charts are invaluable in studying operations such as data entry, sewing, surgical and dental procedures, and certain assembly operations.