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
ESTABLISHING TIME STANDARDS FOR ASSEMBLY ACTIVITY IN CHASSIS
PREPARATION AREA USING MOST
Harish.H 1 , D. N. Shivappa 2 , Jaganur Sangamesh 3
1 PG Student, Department of Mechanical Engineering, Sir M. Visvesvaraya Institute of Technology, Bangalore 562 157, India
2 Professor, Department of Mechanical Engineering, Sir M. Visvesvaraya Institute of Technology, Bangalore 562 157, India
3. Manager, Production Engineering Department, Mahindra RevaElectricVehiclesPvtLtd, Bangalore, India
e-mail: harish.me27@gmail.com
Abstract:
Paper presents development of time standards for all the assembly activities of Chassis Preparation Area in
assembly line of Mahindra Reva Electric Vehicles Pvt Ltd. company using “Maynard Operation Sequence Technique
(MOST)”. Initially thorough study of the chassis preparation area at stage I and II in assembly main line I was
made. For each assembly process the bill of materials, tools description, and process description were studied which
provided detailed information about all the movements of assembly activities. It was identified that many movements
of assembly activities were taking more time than required; using MOSTmovements of these activities were modified.
MOST sheets describing established time standards are developed for all the assembly activities of Stage I and II of
chassis preparation area.
Keywords: Standard Time, MOST, Chassis preparation area, Rear Power Train, Front Suspension, Bundy Tubes,
Steering Rack.
Abbreviations
EST Established Standard Time
MOST Maynard Operation Sequence Technique
RH Right Hand
LH Left Hand
RPT Rear Power Train
TMU Time Measurement Unit
1. Introduction
In the organization under study, the excess work content in an assembly line of “Chassis Preparation Area” was the
problem of concern, The current production system at Mahindra Reva NXR plant has some limitations which
includes longer material handling, less labor productivity, more floor space, large work-in-process inventory and
long setup time. In this work it is proposed to reduce the material handling time at chassis preparation area in stage I
and II of the assembly line. For this purpose the highly practical efficient and cost effective time estimation
technique MOST is used.
2. Literature Review
JafarRazmi [1] present the Standard Time Estimation of a project accomplished in the Iran-Khodro Car
manufacturing Company. A particular predetermined time study approach is developed in this company which
covers all bodyshopoperations.Then the MOST is employed to analyze each operation of standard routings to
determine the associated standard time.
Norashikin Binti Rahman’s [2] study was related to improvement of labor productivity utilizing Process Mapping
and MOST. He proposed two approaches for productivity improvement; which are method study and time study.
Thus, he used process mapping as the method study and MOST as the time study method. The aim of his research
was to identify opportunities for improvement to current production system by performing work study on the manual
operator’s activities, determining current Operator’s utilization as well as establish standard time for manual process.
All this initiated by performing work study on the manual operators’ activities.
Ashish R et al [3] highlights a methodology developed for minimization of non-productive activities in an assembly
line. The case study was conducted in tractor manufacturing unit having a dedicated assembly line for tractor engine.
The study conducted using MOST revealed the excessive movements of the operators that significantly added to the
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