OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
basic work content. The necessary changes were suggested in workplace layout to minimize the stress creating
unproductive movements.
3. MOST Methodology
MOST is the latest work measurement technique that can be easily implemented and practically maintained to
estimate the standard time and also improve methods which maximize the resource utilization. It was originally
developed by H. B. Maynard & Company Inc. and has three versions viz Basic MOST for the activities between 20
sec to 2 min, Mini MOST for the activities shorter than 20 sec, and Maxi MOST for the activities above 2 min.
MOST focuses on three types of object movements Such as General Move, Control Move, and Tool Use which are
briefly explained hereunder
(i) General Move: It represents the movement through the air from one point to another; this activity is represented
by the following sequence of sub-activities or parameters –A B G A B P A,
Where,
A - Action Distance (Mainly Horizontal)
B - Body Motion (Mainly Vertical)
G - Gain Control
P – Placement
The variation in each sub-activity is indicated by an index value. For example, A6 B6 G1 A1 B0 P3 A0 represents,
A6 - Walk three or four steps
B6 - Bend and arise
G1 - Simply grasp an object
A1 - Move within reach
B0 - No body motion
P3 - Place object with adjustment
A0 - No return move
The common scale of index numbers for all MOST sequence models is 0, 1, 3, 6, 10, 16, 24, 32, 42 and 54. The time
value for a sequence model in basic MOST is obtained by simply adding the index numbers for individual sub
activity and multiplying the sum by 10. For instance the standard time in TMU for the sequence A6 B6 G1 A1 B0
P3A0 is,
(6 + 6 + 1 + 1 + 0 + 3 + 0)*10 =170 TMU,
i. e., 170 * 0.036
s = 6.12 s.
(ii) Controlled Move: It represents theobject remains in contact with a surface or the object path is controlled. The
move sequence model is A B G M X I A, in which,
M: Move Controlled
X: Process Time
I: Alignment
(iii) Tool Use:represents describing the manual tools (like wrenches, screw drivers, gauges, writing tools, etc.) these
can be used during an operation. It also covers fingers and mental process. It is a combination of general move
activities.
The MOST has advantages that only one or two observations are needed to measure the work and the rating factor is
inbuilt (in index time) [4]. The result does not deviate from analyst to analyst since the standard calculation sheet
with standard motion sequence and index values are available. It is more accurate than other techniques and involves
less paper work.
4. Time study in chassis preparation area
“Chassis Preparation Area” main line consists of 3 Stages, in Stage I assembly of “Rear Power Train” and “Front
Suspension LH and RH” are carried out. In Stage II assembly of “Steering Rack”, “Proportionating Valves with three
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