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Methods_Engineering_and_Operations_Analysis.pdf
1. METHODS ENGINEERING AND
OPERATIONS ANALYSIS
Methods engineering is the analysis and design
of work methods and systems, including the
tooling, equipment, technologies, workplace
layout, plant layout, and work environment
Other names for methods engineering:
Work study
Work simplification
Methods study
Process re-engineering
Business process re-engineering
2. Objectives in Methods Engineering
Increase productivity and efficiency
Reduce cycle time
Reduce product cost
Reduce labor content
Other Objectives
Improve customer satisfaction
Improve product and/or service quality
Reduce lead times and improve work flow
Increase flexibility of work system
Improve worker safety
Apply more ergonomic work methods
Enhance the environment (both inside and outside the
facility)
3. Operations Analysis
Study of an operation or group of related operations for
the purpose of analyzing their efficiency and
effectiveness so that improvements can be developed
relative to specified objectives.
Objectives in operations analysis
Increase productivity
Reduce time and cost
Improve safety and quality
Methods engineering and operations analysis are very
similar, except that methods engineering places more
emphasis on design.
4. Methods Engineering
Can be divided into two areas:
Methods analysis and Methods design.
Methods analysis is concerned with the study of an
existing method or process.
Objectives:
Eliminate unnecessary and non-value-adding
work elements
Combine elements and operations
Rearrange elements into more logical sequence
Simplify remaining elements and operations
5. Methods design is concerned with either of the
following situations:
1. Design of a new method or process
Required for new product or service and
there is no existing standard
Method must be designed from scratch, using
best existing practice for similar operations
2. Redesign of an existing method or process
based on a previous methods analysis.
6. HOW TO APPLY METHODS
ENGINEERING
Systematic Approach in Methods Engineering
has its basis in the scientific method used in science,
research and development, engineering design, and
other problem areas.
The systematic approach in methods engineering
consists of the steps described below.
Step 1: Define the Problem and Objectives. The problem in
methods engineering study may be low productivity, high
cost, inefficient methods, or the need for a new method or a
new operation. The objective is the desired improvement or
new methods design. Possible objectives are to increase
productivity, reduce labor content and cost, improve safety,
or develop a new method or new operation.
7. Step 2: Analyze the Problem. Data collection and analysis
activities for the type of problem being studied.
Activities often used in this step include the following:
Identify the basic function of the operation.
Gather background information.
Observe the existing process or observe similar
processes if the problem involves a new work design.
Collect data on the existing operation and document the
details in a format that provides itself to examination.
Conduct experiments on the process.
Develop a mathematical model of the process or utilize
an existing mathematical model
Perform a computer simulation of the process.
Use charting techniques.
8. Step 3: Formulate Alternatives. There are always multiple
ways to perform a task or accomplish a process, some of
which are more efficient and effective than others.
The purpose of this step in the problem-solving approach
that is not to identify the best alternative but to formulate
all of the alternatives that are feasible.
Step 4: Evaluate Alternatives and Select the Best. This step
consists of a systematic assessment of the alternatives
and the selection of the best solution among them, based
on the original definition of the problem and objectives.
9. Step 5: Implement the Best Method. Implementation means
installing the selected solution: introducing the changes proposed in
the existing method or operation, or installing the new method or
process.
This may involve pilot studies or trials of the new or revised
Implementation also includes complete documentation of the new or
revised method and replacement of the previous documentation
Step 6: Audit the Study. Perform an audit or follow-up on the
methods engineering project.
How successful was the project in terms of the original problem
definition and objectives?
What were the implementation issues?
What should be done differently in the next methods engineering study?
For an organization committed to continuous improvement, answers to
these kinds of questions help to fine-tune its problem-solving and
decision-making skills.
10. Techniques of Methods
Engineering
Data gathering and statistical tools
Charting and diagramming techniques
Motion study and work design
Facility layout planning
Work measurement techniques
New approaches
11. Charting & Diagramming
Techniques
Network diagrams These are used for analyzing work flow,
assembly line balancing, and project scheduling.
Traditional industrial engineering charting
techniques These are used to symbolize and summarize the details of
an existing operation or sequence of operations. The traditional charting
techniques can be used to analyze the activities of one human worker,
groups of workers, worker-machine systems, materials, parts, and products.
Operation charts
Process charts
Flow diagrams
Block diagrams These diagrams represent alternative ways of
illustrating processes.
12. Motion Study and Work Design
Concerned with basic motions of a human worker
while performing a given task
Examples of basic motion elements:
Reach
Grasp
Move
Release
Guidelines for work design include “principles of
motion economy” that is guidelines for work design in three
categories: (1) use of the human body in developing the standard method, (2)
workplace layout, and (3) design of the tooling and equipment used in the
task.
13. Facility Layout Planning
What is Facility Layout?
Refers to the size and shape of a facility, the arrangement of the
different functions and/or departments in it, and the way the
equipment is positioned.
Plays a significant role in determining the overall efficiency of the
operations accomplished in the facility.
Objectives are to maximize
Customer satisfaction
Utilization of space, equipment, & people
Efficient flow of information, material, & people
Employee morale & safety
Problem area includes:
Design of a new facility
Installing new equipment, retiring old equipment
Expanding (or contracting) an existing facility
14. How do you conduct a plant layout
project?
1. Define or redefine the goals of the facility.
2. Specify the activities to be performed in accomplishing the
goals
3. Determine the interrelationships among all activities
4. Determine the space requirements for all activities
5. Generate alternative facility layouts
6. Evaluate alternative facility layouts
7. Select a facility layout
8. Implement facility layouts
9. Maintain and adapt the facility layout
15. Work Measurement Techniques
Four basic work measurement techniques:
1. Direct time study
2. Predetermined motion time systems (PMTS)
3. Standard data systems
4. Work sampling
PMTS and work sampling can be often used in methods
engineering to make improvements in the work methods
Predetermined motion time system (PMTS) is a database of
basic motion elements and their associated normal time values, and
it includes procedures for applying the database to analyze manual
tasks and establish standard times for the tasks.
The principal application of a PMTS is to determine standard times.
16. Work sampling is a statistical technique for determining
the proportions of time spent by workers or machines in
various categories of activity.
It can be applied to determine machine utilization, worker
utilization, and the average time spent performing various
types of activities. As such it can be a useful tool in
methods engineering for identifying areas that need
attention.
For example, if a work sampling study finds that workers in
a facility spend large amounts of their time waiting for
work, then this is a management problem that should be
addressed.
17. Basic Data Collection & Analysis
Tools
1. Histograms
2. Pareto charts
3. Pie charts
4. Check sheets
5. Defect concentration diagrams
6. Scatter diagrams
7. Cause and effect diagrams
18. Histogram
A histogram is a statistical graph consisting of bars
representing different values or ranges of values, in
which the length of each bar is proportional to the
frequency or relative frequency of the value.
A useful tool because the analyst can quickly
visualize the features of the data, such as:
(1) the shape of the distribution,
(2) any central trend exhibited by the distribution,
(3) approximations of the mean and mode of the distribution,
(4) the amount of scatter or spread in the data.
20. Pareto Chart
Special form of histogram in which attribute data are arranged
according to some criterion such as cost or value
Based on Pareto’s Law: “the very important few and the
unimportant many”
Often identified as the 80%-20% rule
80% of a nation’s wealth is owned by 20% of the
population
80% of sales are accounted for by 20% of the Stock
Keeping Units
80% of a factory’s production output is concentrated in
only 20% of its product models.
23. Cause and Effect Diagram
A graphical-tabular chart used to list and analyze the potential
causes of a given problem
Can be used to identify which causes are most significant and
how to take corrective action against them
Also known as a “fishbone diagram”
In application, cause and effect diagrams are often developed
by worker teams who study operational problems.
The diagram provides a graphical means for discussing and
analyzing a problem and listing its possible causes in an
organized and understandable way.
24. As a starting point in identifying the causes of the problem, six
general categories of causes are often used because they are the
factors that affect performance of most production and service
processes. They are called the 5Ms and 1P
Machines. This refers to the equipment and tooling used in the process.
Materials. These are the starting materials in the process.
Methods. This refers to the procedures, sequence of activities, motions,
and other aspects of the method used in the process.
Mother Nature. This is for environmental factors such as temperature
and humidity that might affect the process.
Measurement. This relates to the validity and accuracy of the data
collection procedures.
People. This is the human factor.
Does the worker bring the necessary skills to the process?
26. Methods Engineering and
Automation
USA Principle
Ten Strategies for Automation
Automation Migration Strategy.
The USA principle is a common sense approach to automation
projects. USA stands for three steps in the analysis and design
procedure:
Understand the existing process.
Simplify the process.
Automate the process.
27. Understand the Existing Process
What are the inputs?
What are the outputs?
What exactly happens to the work unit
between input and output?
What is the function of the process?
How does it add value to the product?
28. Simplify the Process
What is the purpose of this operation or this transport?
Can this step be eliminated?
Is the most appropriate technology being used?
How can this step be simplified?
Can steps be combined?
Can steps be performed simultaneously?
Can steps be integrated into a manually operated
production line?
29. Automate the Process
The USA Principle is a good first step in any automation
evaluation project.
If automation seems a feasible solution to improve productivity,
quality, or another measure of performance, then the following
ten strategies provide a road map to search for these
improvements.
The ten strategies constitute a checklist of the possibilities for
improving the work system though automation or simplification.
For many situations, multiple strategies can be implemented in
one improvement project.
30. Ten Strategies for Automation
1. Specialization of operations
2. Combined operations
3. Simultaneous operations
4. Integration of operations
5. Increased flexibility
6. Improved material handling and storage
7. On-line inspection
8. Process control and optimization
9. Plant operations control
10. Computer integrated manufacturing (CIM)