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
be become more reliable. The predetermined time study forms the basis for the MOST work measurement
technique [3]. They pointed out that estimating methods cannot determine accurate times,hence MOST is a
standard method to determine the potential error which helps in minimising the time taken to perform a task or
operation.
Francesco Longoand others [4] pointed out that one of the most important approaches for studying line balancing
is work measurement technique using MOST. They suggested that for designing an assembly line, both the line
balancing as well as the work measurement technique has to be considered, which plays an important role for
measuring the time standards in the assembly process. Ashish Thakre etal proposed that the MOST work
measurement technique is used for minimization of non-productive activities in an assembly line. The study
conducted using MOSTrevealed the excessive movements of the operators that significantly added to the basic
work content [5].
3. MOST Methodology
The Maynard Operation Sequence Technique (MOST) is a work measurement technique that concentrates on the
movement of objects. It is used to analyze work and to determine the normal time that it would take to perform a
particular process/operation.
MOST is used to:
• Observe and document the methods of operation
• Break down the sub-operation into logical activities
• Select the appropriate sequence model for each activity
• Select the appropriate ‘indices values’ for the parameters of the models, including their repetitions.
• Synthesis the Standard Operation time of the activities.
MOST focuses on three types of object movements:
(i) General Move is applicable when objects are moved manually from one location to another freely through the
air. To consider the various ways in which a General Move can occur, the activity sequence is made up of four
sub-activities.
A - Action distance
B - Body motion
G - Gain control
P – Placement
The sequence model defines the events or actions that always take place in a prescribed order when an object is
being moved from one location to another. These sub-activities, or sequence model parameters, are then assigned
time-related index numbers based on the motion content of the sub-activity. For each object moved, any
combination of motions might occur, and using MOST, any combination may be analyzed.
(ii) Controlled Move sequence is used to cover such activities as operating a lever or crank, activating a button or
switch, or simply sliding an object over a surface. In addition to the A, B and G parameters from the General
Move Sequence, the sequence model for a controlled move contains the following sub-activities:
M: Move controlled
X: Process time
I:Alignment
(iii) Tool Use sequence model covers the use of hand tools for such activities as fastening or loosening, cutting,
cleaning, gauging, and recording. Also, certain activities requiring the use of the brain for mental processes can
be classified as Tool Use, for e.g. reading and thinking. The Tool Use Sequence Model is a combination of
General Move and Controlled Move activities.
4. Time Study of Body Side Panel Bonding Process
The Body Side Panel Bonding process begins with pushing the chassis trolley to the body side panel bonding
bay and locating the chassis using the foot operated pedal and attaching the front and rear locator to the chassis
by inserting the dowel pin and toggle clamp. Attach static mixer at the tip of the Graco dispenser gun and
dispense mixer's length of adhesive on the waste cloth to ensure uniform mixture and the apply the sealant on the
RH side and LH side and fix the body side panel RH by locating and inserting the Tuflock Screws and firmly fix
it to the chassis and repeat the same step for LH side.
Bring in the body side panel fixture by using the switch control box and locate the bonding fixture above the
chassis. Press the tackle down button to bring the fixture down until the roof railing paddings will touch the roof
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