MOST

1. MOST Maynard Operation Sequence Technique Work Measurement System

2. Methods - Time Measurement H. B. Maynard was one of three persons instrumental in the creation of MTM.

3. Kjell Zandin, while working in the Swedish Division of H. B. Maynard in the late 1960’s, detected striking similarities in the sequence of MTM defined motions whenever an object was handled.

4. Under MOST, the primary work units are no longer basic motions as in MTM, but collections of these basic motions dealing with moving object.

5. MOST makes the assumption that to move an object, a standard sequence of events occurs.

6. Under MOST, objects can be moved in only one of two ways: • They are picked up and moved freely through space -- the GENERAL MOVE. • They are moved and maintain contact with another surface -- the CONTROLLED MOVE.

7. The MOST Family • Basic MOST -- General Operations • Mini MOST -- Repetitive Operations • Maxi MOST -- Non-repetitive Operations • Clerical MOST -- Clerical Operations

8. Maxi MOST is used to analyze operations that are likely to be performed less than 150 times per week.

9. Basic MOST is used for operations that are likely to be performed more than 150 times but less than 1500 times per week.

10. Mini MOST is used to analyze operations likely to be repeated more than 1500 times per week.

11. The Decision Diagram provides a simple procedure for selecting the most appropriate MOST Work Measurement System to use.

12. The MOST Decision Diagram is based on +/- 5% accuracy and a 95% confidence level.

13. System Selection Charts may be used in lieu of the Decision Diagram for choosing the best MOST Work Measurement System to use.

14. The MOST Standard Form provides the analyst with a simple, consistent format for analyzing work using the method.

15. It should be possible to complete a MOST analysis by observing two complete cycles of work in slow motion.

16. If the method is well established and the analyst knows the operation and conditions, the Basic MOST calculations can be made from the office and used to predict the times for a new procedure.

17. General Rules for Using MOST • Each sequence model is fixed. • No letter may be added or omitted for the General or Controlled Move Sequence. • In general, no letter may be added or omitted for the Tool Use Sequence, with a few exceptions.

18. General Move Sequence

19. Four subactivities constitute the General Move Sequence • “A” Action Distance (mainly horizontal) • “B” Body Motion (mainly vertical) • “G” Gain Control • “P” Placement

20. Roughly 50% of all manual work occurs as a General Move.The percentage runs higher for assembly and material handling and lower for machine shop operations.

21. The General Move follows a fixed sequence of steps: • Reach, either directly or in conjunction with body motions or steps. • Gain control of the object. • Move the object, as in “reach”. • Place the object in temporary or final position. • Return to the workplace.

22. The General Move Sequence Model A B G A B P A

23. Action Distance (A) This parameter is used to analyze all spatial movement or actions of the fingers, hands, and/or feet.

24. A0< 2 Inches This is any displacement of the fingers, hands, and/or feet a distance of 2 inches or less.

25. A1 Within Reach Actions that are confined to an area described by the arc of the outstretched arm pivoted about the shoulder.

26. A3 One to Two Steps The trunk of the body is shifted or displaced by walking, stepping to the side, or turning the body around using 1 or 2 steps.

27. More Than 2 Steps Used with Action Distance data table to cover longer movements.

28. Body Motion (B) This parameter is used to analyze either vertical motions of the body or the actions necessary to overcome an obstruction or impairment to body movement.

29. B6 -- Bend & Arise From an erect standing position, the trunk of the body is lowered by bending from the waist and/or knees to allow the hands to reach below the knees.

30. B3 -- Bend & Arise, 50% Occurrence Bend & Arise is required only 50% of the time during a repetitive activity.

31. B10 -- Sit or Stand A series of several hand, foot, and body motions to move a stool / chair into position followed by the body sitting or standing.

32. B16 -- Stand and Bend This is a case where a sitting person must stand up and walk to a location to gain control of an object placed below knee level, where a Bend & Arise is required.

33. B16 -- Bend & Sit This applies when gaining control of an object requires a Bend & Arise followed by a Sit prior to placing the object.

34. B16 -- Climb On or Off This parameter variant covers climbing on or off a work platform on any raised surface (~3 ft) using a series of hand and body motions to lift or lower the body.

35. B16 -- Passing Through Door Passing through a door consists of reaching for and turning the handle, opening the door, walking through the door, and subsequently closing the door.

36. Gain Control (G) This parameter is used to analyze all manual motions employed to obtain complete manual control of an object(s) and to subsequently relinquish that control.

37. G1 -- Light Object Gain control of an object by grasping it as long as no difficulty is encountered.

38. G1 -- Light Objects Simo One hand gains control of a light object while the other hand obtains another light object.

39. G3 -- Light Object(s) Non-Simo While one hand is grasping an object, the other hand must wait before it can grasp the other object.

40. G3 -- Heavy or Bulky In grasping a heavy or bulky object there is a delay between when the object is grasped and when it begins to move due to weight, bulk, etc.

41. G3 -- Blind or Obstructed Access to the object is restricted because an obstacle prevents the operator from seeing the object or creates an obstruction to the hand/fingers in attempting to gain control.

42. G3 -- Disengage An application of muscular force to free an object from its surroundings typified by a need to overcome resistance followed by sudden movement and recoil of the object.

43. G3 -- Interlocked Interlocked means the object is intermingled or tangled with other objects and must be separated or worked free before reaching control.

44. G3 -- Collect Gain control of several objects jumbled together in a pile or spread out on a surface.

45. Placement (P) This parameter is used to analyze actions at the final stage of an object’s displacement to align, orient, and/or engage the object with other object(s) before control of the object is relinquished.

46. P0 -- Pickup Objects This is “placement” in which no placement occurs. The object is picked up and held.

47. P0 -- Toss Object(s) Another “placement” where placement does not occur. The object is released during the “action distance” (A) parameter without placing motions or pause to point the object toward the target.

48. P1 -- Lay Aside The object is placed in an appropriate locations with no apparent aligning or adjusting motions.

49. P1 -- Loose Fit The object is placed in a more specific location than described by the Lay Aside parameter, but with tolerances so loose that only a modest amount of control is needed for placement.

50. P3 -- Adjustments Adjustments are defined as the corrective actions occurring at the point of placement, and recognized by obvious efforts, hesitations, or correcting motions to align, orient, and/or engage the object.