Applied Motion Study
A Collection Method to industrial Preparedness

MOTION STUDY AND TIME STUDY 67 all being simultaneous; and the details of the con- ditions of the surroundings that are visible to the eye are recorded without the failings of mem- ory. This was a distinct step in advance, but we realised that there was a lack in the records. It was difficult, even for one especially trained and experienced to visualise the exact path of a mo- tion, and it was not possible to measure the length with precision from the observations of the motion picture film alone, as there is no sum- mary or recapitulation of all the motions of a cycle or operation in any one picture. To over- come this lack we invented the cyclegraph method of recording motions. This consists of attaching a small electric light to the hand or other moving part of the person or machine under observation. The motion is recorded on an ordinary photo- graphic film or plate. Upon observing our very first cyclegraph records, we found that we had attained our desire, and that the accurate path taken by the motion stood before us in two di- mensions. By taking the photographic record stereoscopically, we were able to see this path in three dimensions, and to obtain what we have called the stereocyclegraph. This showed us the