Predetermined Time Systems Using MTM

1
Predetermined Time Systems Using MTM

• MTM Methods-Time Measurement
• MTM-1 // MTM-2 // MTM-3
• Developed by the Gilbreths
• Occurs in 2 steps
• Break work down into its therblig elements
• Assign time values to each element
• Each element is independent and additive

2
MTM-1

• Most detailed system
• Motions are broken into 10 categories
• Times are found in Tables 29.1-29.11
• Distance, complexity, and/or weights are taken
  into consideration

• MTM Categories
• Reach
• Move
• Turn
• Apply Pressure
• Grasp
• Position
• Release
• Disengage
• Body Motions
• Eye Motions

3
Methods Analysis and Time

• Reference Karger, D. Bayha, F. Engineered
  Work Measurement, 4th edition. New York, Ind.
  Press 1987.
• Time is given in time measurement units
  (TMUs)
• 1 TMU 0.000 010 h 0.000 600 min 0.036 s
• -Or-
• 1 s 27.78 TMUs
• 1 min 1,667 TMUs
• 1 h 100,000 TMUs

4
MTM-2 and MTM-3

• Fewer types of motions than MTM-1 therefore are
  easier to use
• Fewer cycles needed in order to study the process
• MTM-1 requires 250 cycle times
• MTM-2 requires 100 cycle times
• MTM-3 requires 35 times

5
Same rules as MODAPTS

• Need experienced operator and experienced
  practitioner
• Allowances are applied separately
• Will need to measure certain number of cycles in
  order to get statistically significant sample

6
Plus some additional rules

• Must be repetitive work, not occasional
• Distances (or degrees or other qualifying codes)
  determine time elements
• Tables must be present in order to get correct
  time per element
• Additional weight (or symmetry or other
  penalties) may be applied