Time recording device
In time record in labor studies of Industrial Engineering , in addition to the traditional stopwatch in conjunction with a time receiver sheet widely used devices, which record the recording data itself. Such devices are time recording devices , time trial equipment or time recording systems mentioned. In Germany, this distinction between timing devices is important because the use of a stopwatch and paper does not require co-determination , while a time recording device is a technical monitoring device within the meaning of Section 87 (1) No. 6 BetrVG , the use of which is subject to co-determination.
A first time recording device was developed by Holger G. Thuesen at the Oklahoma Agricultural and Mechanical College . The time in thousandths of a minute was recorded on a strip of paper by operating a lever.
Outline of timing devices
REFA differentiates timing devices according to whether they are used by an observer ( external recording) or automatically record ( self- recording ). In the first category, next to the stopwatch, we find:
- special digital data acquisition systems from various providers as well
- Software that can be used on portable computers.
As a third-party record
- Image storage devices (video cameras, automatic cameras, etc.) and
- A distinction is made between measuring devices for other data (tachometer, piece counter, scales, dynamometer, etc.).
Systems in detail
Data acquisition with the stopwatch
When data is determined with the stopwatch, the recorded times are recorded manually on a time recording sheet. Special variants are used with a division in hundredths of a minute (HM). The recorded data are then typically transferred to spreadsheets or special programs and evaluated there. This manual data transfer is time-consuming and error-prone.
Digital stopwatches have the advantage over mechanical watches that they can display both the individual time of a measured process segment and the total time that has passed since the start of the clock, the progress time.
Important manufacturers are Hanhart and Meylan.
Data acquisition with digital data acquisition systems
With the development of modern computer technology, digital data acquisition systems have also emerged. In principle, these systems work in such a way that the time studies are prepared on a PC and the prepared files are then transferred to the data acquisition device. The time is recorded with the special device that works like a stopwatch. The advantage of these devices is that, in addition to the time data, all processes can be recorded immediately in text form and, depending on the design, also evaluate them. When played back on the computer, they can be further evaluated with special programs.
Audit security plays a role here. As with conventional time recording, the original sheet is a document, the same applies to the recorded original file, which must be protected against changes.
The devices not only make the recording work easier, but also take over the manual transfer of the data from the time recording to the evaluation, which saves a considerable amount of time and significantly reduces the error rate.
The devices are mostly designed for two-handed operation. But there are also simple variants for one-handed operation. These mostly have no (concurrent) evaluation functions.
Major manufacturers are: dmc-ortim, REFA, DRIGUS, Meylan, Mitterhauser.
Software that can be used on portable computers
Software that can be used on portable computers such as laptops, tablets, or subnotebooks is the most efficient way of performing time recordings. The data acquisition is prepared directly in the laptop and can also be evaluated here later. This means that the time recording is independent of special hardware. The times can be measured with the integrated electronic stopwatch. Due to the open hardware, special measures are required for these systems to ensure audit security.
Major manufacturers are: dmc-ortim, REFA, DRIGUS, Mitterhauser, OP&S, Luz Consulteam: PROCESS TM, TimeStudy.
Image storage devices
By recording a sequence with an image storage device, recording and evaluation, in particular the performance level assessment, are separated from one another. The stored sequence can be evaluated on a computer, whereby the individual sequence sections can only be identified and times assigned later.
The use of image storage devices requires special precautions:
- In the case of electronic cameras, an original of the recording must be archived and suitably secured against unauthorized access.
- The personal rights of the persons saved in the picture must be observed. Misuse of the images must be ruled out.
- Records that are no longer required must be destroyed.
Against the background of these precautions, the collective bargaining parties had long refused to approve the use of video cameras for time recording.
Individual evidence
- ↑ See page no longer available , search in web archives: BAG, decision of December 15, 1992
- ↑ See: Maynard, Harold Bright (Ed.); Krüger, Kurt (translator); REFA e. V. (Ed.): Handbook of Industrial Engineering: Design, planning and control of industrial work. Volume 3: Berlin time schedule: Beuth, 1956. P. 26 Copy here online
- ↑ See: REFA Association for Work Studies and Business Organization e. V. (Hrsg.): Determination of time data: course material for module 3210247. Darmstadt: REFA, 2001. p. 13
- ↑ HM watches from Meylan
- ↑ See: REFA Association for Work Studies and Business Organization e. V. (Hrsg.): Determination of time data: Course material for module 3210247. Darmstadt: REFA, 2001. S. 24
- ↑ See: REFA Association for Work Studies and Business Organization e. V. (Hrsg.): Determination of time data: course material for module 3210247. Darmstadt: REFA, 2001. S. 18. The company OTTO-OTTO still mentioned in the source seems to be based on its homepage ( Memento of the original dated July 5, 2010 in Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (read on June 21, 2011) to no longer be a provider.
- ↑ PROCESS TM from the PROCESS SUITE by Luz Consulteam
- ↑ See: REFA Association for Work Studies and Business Organization e. V. (Hrsg.): Determination of time data: course material for module 3210247. Darmstadt: REFA, 2001. p. 22
