Predetermined Motion Time Systems

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Predetermined Time Systems
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Presentation transcript:

Predetermined Motion Time Systems Sections: Overview of Predetermined Motion Time Systems – part 1 Methods-Time Measurement – part 2 Maynard Operation Sequence Technique

Predetermined Motion Time Systems Methods-Time Measurement

Methods-Time Measurement MTM is used to: analyze method for performing a given task set a time standard for the task Definition: “Procedure which analyzes any manual operation or method into the basic motions required to perform it and assigns to each motion a predetermined time standard which is determined by the nature of the motion and the conditions under which it is made”

Methods-Time Measurement “Methods-Time” hyphen shows connection bet.: basic motions used to perform a task time values associated with these motions Note, 𝑇 𝑠𝑡𝑑 should not be calculated until: task is divided into its component elements then determining if methods improvements can be made (step 3 in PMTS procedure)

Methods-Time Measurement MTM versions: MTM is family of PMT systems MTM-1 original MTM first-level PMTS upon which all of the other MTM systems are based MTM is a family of products available through the MTM Association in Des Plaines, Illinois Web site can be accessed at www.mtm.org

MTM-1 MTM basic motions Operates at BME level in pyramidal structure of work Most MTM-1 BME’s involve hand and arm movements Also: BME’s for eye, leg, foot, and body actions Many BME’s correspond to original therbligs developed by Frank Gilbreth However, changes include: Adjustments to conform to needs of MTM Adding new elements not included in original therbligs

Methods-Time Measurement

MTM-1 TMU’s: time measurement units developed by studying motion pictures of work activity TMU is now defined as: 1 𝑇𝑀𝑈 = 0.00001 ℎ𝑟 = 0.0006 𝑚𝑖𝑛⁡= 0.036 𝑠𝑒𝑐 1 sec⁡= 27.8 𝑇𝑀𝑈 1 𝑚𝑖𝑛 =1667 𝑇𝑀𝑈 1 ℎ𝑟 =100,000 𝑇𝑀𝑈 * time per frame of motion picture film

MTM-1 Table 3: defines the MTM-1 motion elements Table 4: tabulation of time values* Steps for MTM: Step 1: analyst describes task in terms of these BME’s taking note of: work variables that influence element time accounting for simultaneous right-hand and left-hand motions internal elements when task involves operation of machine, etc. * Table 3 and Table 4 are available on the course website

MTM-1 Cont. Steps for MTM: Step 2: analyst retrieves time for each BME* normal time for task: 𝑇 𝑛 = 𝑇 𝐵𝑀𝐸 analyst then adds 𝐴 𝑝𝑓𝑑 according to company policy work being measured: 𝑇 𝑠𝑡𝑑 = 𝑇 𝑛 (1+ 𝐴 𝑝𝑓𝑑 ) note, analyst must first receive proper training in technique * Solve example: find TMU for M6B10 (see table 3, pg. 367)

Other MTM Systems Additional MTM systems added: serve specific work situations: clerical activity machine shop work electronic testing second- and third-level systems: reduce time required to develop 𝑇 𝑠𝑡𝑑 several computerized systems have been developed based on MTM* MTM Web site: www.mtm.org

Other MTM Systems MTM-2 – Second-level PMTS in which basic motion elements are combined into motion aggregates GET – combines Reach and Grasp PUT – combines Move and Position MTM-3 – Third-level PMTS which has four motion categories Handle Transport Step and foot motions Bend and arise

Other MTM Systems

Other MTM Systems