Predetermined time standards pdf

For each of these actions basic times are tabled. For example, in Work-Factor the time unit is one thousandth of a minute the Work-Factor Time Unit whereas in MTM the unit is one hundred-thousandth of an hour time measurement unit, tmu.

The times for basic actions are adjusted for other factors which take into account such variables as: distances moved, in inches or centimetres difficulty in performing the actions, such as avoiding obstacles during moves, closeness of fit during assembling, weight of the object, all of which increase the times to carry out the basic actions.

The above basic motions cover most of the actions performed by humans when carrying out work. Other basic activities include:. In order to speed up measurement time the major systems all include different levels of detail, such as:. PMTS is often used to generate synthetic data or standard data banks which are overall basic times for more complex tasks such as maintenance or overhauling of equipment.

This is achieved by synthesizing the hundreds of small jobs measured using PMTS into a time for the complete project. Basic times produced by PMTS need to have relaxation allowances and other necessary allowances added to produce standard times. For example: R14C is translated as "Reach 14 in.

R14B is translated as "Reach 14 in. Objects within the range 0. MTM1 - the 'highest-level' or most detailed member of the family - was developed in the s by analysing large numbers of repetitive cycles of manual work on film. The time taken to Reach to an object is then given by a table based on the kind of Reach e. Similar tables give times for each of the other basic movements categorised and measured similarly.

MTM is suitable for measuring short cycle, highly-repetitive work. MTM2 is thus quicker to apply, but more suited to longer-cycle work where the fine level of discrimination of MTM1 is unnecessary in terms of meeting accuracy requirements. Become part of Europe's largest productivity professional body which provides a host of opportunities to maximise your potential and develop your career with like minded Professionals.

IMS membership equips you with the resources and networking opportunities to develop your career. Apply today! Skip to Content. Search for:. Friday, 14 January Home. Predetermined motion time systems PMTS Predetermined motion time systems PMTS are work measurement systems based on the analysis of work into basic human movements, classified according to the nature of each movement and the conditions under which it is made.