Systems of predetermined times

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SVZ ( systems of predetermined times , English: predetermined motion time system ) are systems with the help of which, simply by analyzing a movement sequence, the time required for this is derived directly as the target time . When used, the motion analysis is also used to find weak points and eliminate them, i.e. to improve and accelerate work.

The individual movements are evaluated on the basis of tables with elaborately determined standard times . The target time for the workflow is derived from this.

The times in the tables are based on the so-called normal performance , the performance that a person can achieve over an average working day of eight hours without additional (work) fatigue. For this purpose, high-speed cameras are used and the respective work is carried out for a statistically relevant number of people.

Today there are essentially two processes in use in Germany:

SVZ are not only used to determine the times required to carry out a work process, but rather also to study movement . Above all, through the compression of movement , the recognition and elimination of difficult elements in a sequence of movements and simplification of movements , the recognition and dismantling of difficult elements, movement-supported work processes are also rationalized .

history

Frederick Winslow Taylor already divided the work into elementary movements for his extensive time studies inorder to describe and classify them more precisely. He almost always found inadequate processes and working conditions and opportunities to make the work more effective.

Close associates of Taylor , Frank Bunker Gilbreth with his wife Lilian , are considered to be the founders of movement studies . They analyzed motion sequences with the help of film recordings and developed a system in which 17 different movement elements were sufficient to describe all work processes. These process elements were - quite immodestly - called the reverse of the name Therbligs .

The " Motion-Time-Analysis " (MTA) is traced back to Segur . It became known in 1924 and was used in almost every branch of American industry during the 1920s and 1930s. It is considered to be the oldest elementary time method still used industrially today.

Building on this, Joseph Quick developed the WORK-FACTOR system, which was extensively tested in 1938 and introduced in industry in 1946.

In 1958 REFA took over the process in Germany under license. In 1964, the activities were transferred to an independent registered association that has been the sole representative of the system in German-speaking Europe since 1973. In 2003 the cooperation with REFA was revived. International Industrial Consult IIC AG has been a cooperation and marketing partner since 2007.

Methods-Time Measurement (MTM) is a less complex and therefore probably more common method. Herold Bright Maynard worked on the basics of the MTM with John Schwab and Gustave Stegemerten until 1940 . Maynard finally founded the US MTM Association for Standards and Research in New York in 1951 , to which the three transferred the rights.

In Germany, MTM was founded in 1962 through the establishment of the " Deutsche MTM-Vereinigung e. V. “institutionalized.

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Individual evidence

  1. ↑ REFA Association for Work Studies and Business Organization e. V. (Hrsg.): Methodology of the company organization: Lexicon of the company organization . Munich: Carl-Hanser, 1993. - ISBN 3-446-17523-7 . Page 47.