After reading this article you will learn about:-
1. Definition
and Concept of Work Study
2. Need for Work Study
3. Advantages.
Definition and Concept of Work
Study:
Work study, as defined by British Standard Institution, is a
generic term for those techniques particularly ‘Method Study’ and ‘Work
Measurement’ which are used in the examination of human work in all its
contexts and which lead systematically to the investigation of all the factors
which effect the efficiency of the situation being reviewed, in order to seek
improvements.
Actually, work study investigates the work done in an organization
and it aims at finding the best and most efficient way of using available
resources, i.e., men, material, money and machinery. Every organization tries
to achieve best quality production in the minimum possible time.
The time
required to manufacture an item depends upon the manufacturing procedure; and
one phase of work study known as Method study aims at finding the best possible
manufacturing procedure which involves, least time and does not cause fatigue
to the workers.
In brief, method study or motion study aims at finding the best
way of doing a job. Method Study may be defined as the systematic investigation
(i.e., recording and critical examination) of the existing method of doing a
job in order to develop and install an easy, rapid, efficient, effective and less
fatiguing procedure for doing the same job and at lower costs.
This is generally achieved by eliminating unnecessary motions
involved in a certain procedure or by changing the sequence of operation or the
process itself.
Once the method study has developed an improved procedure for
doing a job, the work Measurement or Time Study will find the time allowed to
complete the job by that procedure. Work Measurement may be defined as the
application of different techniques to measure and establish the time required
to complete the job by a qualified worker at a defined level of performance.
The time necessary to complete a job is determined from number of observations.
Need for Work Study:
Principles
of work study used to be employed even long ago, in order to explore
improvements, when industry was simple and involved lesser problems; of course,
a systematic procedure was not there. Today the industries with all their
complexities and modernization naturally demand a more systematic approach like
the work study in its present form.
Work study finds applications
in:
1. Industries (Production operations, research and development),
2. Marketing, sales and distribution,
3. Offices,
stores and warehouses,
4. Material handling,
5. Design,
6. Building and other constructions,
7.
Transport,
8. Hospital,
9. Army, and
10. Agriculture, etc.
Advantages of Work Study:
(a) Uniform
and improved production flow,
(b) Higher productive efficiency,
(c) Reduced manufacturing costs,
(d) Fast and accurate delivery dates,
(e) Better
employee-employer relations,
(f) Better service to customers,
(g) Job security and job satisfaction to workers,
(h) Better working and other conditions, and
(i) Higher
wages to workers.
Objectives of (or Advantages
Obtained Through) Method Study:
(1) Improved working processes and standardized procedures,
(2) Better work place layout; neat and clean environments and
working conditions,
(3) Less fatigue to operators,
(4) Better product quality,
(5)
Effective utilization of men, materials and machinery,
(6) Efficient and fast material handling,
(7) Reduced health hazards,
(8) Efficient planning of the section, and
(9) Streamlined working procedures.
Objectives of (or Advantages
Achieved Through) Work Measurement:
(5)
Effective utilization of men, materials and machinery,
(6) Efficient and fast material handling,
(7) Reduced health hazards,
(8) Efficient planning of the section, and
(9) Streamlined working procedures.
Objectives of (or Advantages Achieved
Through) Work Measurement:
(6) Decides
realistic labor budgeting and provides a basis for standard costing system;
(7) Provides a basis for fair and sound incentive schemes; and
(8) Results in effective labor control.
Irrespective of the advantages mentioned above, the introduction
of work study has always been looked by the supervisors, workers or union with
suspicion. They probably feel insecure and think that work study will result in
reduction in their salaries. Even otherwise a sudden change is never
appreciated therefore workers and union should be taken into confidence and
properly convinced before introducing work study.
Operation Analysis:
Operation Analysis is a detailed study of different operations
involved in doing a work. Operation analysis becomes necessary in order to
investigate the shortcomings of the existing method and to develop an improved
procedure.
Operation
analysis suggests, whether some elements, should be eliminated or combined or
their sequence should be altered in order to obtain effective utilization of
existing manpower and machinery with the minimum fatigue incurred by the
workers. The analysis mainly considers the movements of the limbs and aims at
finding a simpler and economical method of doing the job.
Before the procedural steps of a task are analyzed and the
motions (of an operator) are studied or eliminated, an operation chart is
constructed. Figure 9.7 shows an operation chart of the existing method of
assembling nuts and bolts.
As a next step, the different motions involved are subjected to
specific and detailed questioning with a view to eliminate unnecessary motions,
and to arrange the remaining motions in a better sequence. Principles of motion
economy serve as a very good guide in developing a better and improved method.
Besides assessing the present
method a per the principles of motion economy, it is also subjected to
following questions (whichever are applicable) with regard to:
(a) Worker:
1. Is he mentally and physically fit?
2. Does he incur unnecessary fatigue?
3. Does he need training to improve?
4. Does he get suitable salary?
(b) Set-Up:
1. Are tools and other equipment readily available?
2. Can the set-up be modified or can the number of set-ups be
decreased?
(c) Material:
1. Is material of the proper specification i.e., composition,
diameter, width, thickness of weight?
2. Can it be substituted by a less costly material?
3. Can scrap be minimized?
(d) Material Handling:
1. Can materials be transferred in big (unit) lots, thereby
reducing the number of handlings?
2. Is it possible to avoid back tracking of the material?
3. Can the distances, by which the material is moved, be cut
short?
(e) Operations:
1. Can some operations be eliminated?
2. Can some operations be made automatic?
3. How, re-sequencing of the operations will effect?
4. Is it possible to combine some operations?
(f) Tools and Fixtures:
1. Are they available in good condition?
2. Are they suitably located and prepositioned?
3. Is it advantageous to modify existing jigs and fixtures for
better productivity?
(g) Working Conditions:
1. Is light and ventilation adequate?
2. Are the operations and working conditions safe?
3. Are facilities of wash rooms, etc., available?
Analysis of Motion:
The motions or movements of the limbs of a worker play a major
part in the fabrication or manufacture of the products. By carefully observing
a worker while he is doing an operation, a number of movements made by him
which appear to be unnecessary and unproductive can be identified and
eliminated.
Analysis of an operation, when carried out in terms of
individual motions of a worker is known as motion analysis.
The purpose of motion analysis is to design an improved method
which eliminates unnecessary motions and employs human efforts more
productively. In doing so the principles of motion economy prove to be very
helpful.
Steps involved in Motion
Analysis are:
(a) Select the operation to be studied.
(b) List and chart various motions performed by the operator.
(c) Identify the productive and idle motions.
(d) Eliminate the unnecessary and non-productive motions.
(e) Redesign the existing operating procedure by employing
minimum number of motions in the most appropriate sequence and in accordance
with the principles of motion economy.
(f) Impart necessary instructions to the worker so that he
develops proper habit cycle.
(g) Check once again the procedure in the light of step (e)
above.
(h) The procedure may be standardized.