Lesson 80 of Industrial Engineering ONLINE Course.
Lesson 81: Process and Operation Analysis for Finding Productivity Improvement Opportunities - Module. Process Analysis - Eliminate, Combine, Divide, Rearrange, Simplify (ECDRS).
Three Major Channels of Process Improvement.
1. Process Redesign by Process Planning Team.
2. Process Improvement Study by Industrial Engineering Team.
3. Continuous #Improvement by Involving Shop Floor Employees and All Employees. Continuous Improvement - Employee Participation Principle of Industrial Engineering
Machine Work Study - Innovation in Industrial Engineering by Narayana Rao K.V.S.S.
Productivity promotes competitiveness.
IE promotes productivity.
Innovations in Industrial Engineering are needed to increase productivity and competitiveness.
Taylor's Industrial Engineering
Taylor's industrial engineering consists of reduction of cost of production or productivity improvement based on redesign of machines, cutting tools, machining parameters and operator work practices in using machines, hand tools or only hands. This point was only indicated in a paragraph on additional contributions of Taylor by Ralph Barnes in his book on Motion and Times Study (3r ed. and 5th ed.). Barnes main focus was motion study (work methods design). Barnes described the work of Taylor in improving loading of material with shovels in detail. More chapters were devoted to Gilbreth's motion study and only in case of time study Taylor is given the credit. It so happened in industrial engineering curricula that "Motion and Time Study" became the core subject of IE. There is no other subject that directly addressed continuous improvement of processes.
In the industrial engineering literature the contribution of Taylor and the implications of those contributions were not captured adequately in Motion and Time Study and there is no other subject that focuses on work related to machines. Industrial engineering discipline lost the insight of Taylor. Peter Drucker said, after Taylor, there is no further great insight in industrial engineering. As industrial engineering discipline ignored Taylor's ideas, Drucker thought may be even Taylor's insight is half insight. It is the failure of subsequent industrial engineering academicians and professionals not to recognize the shortcoming of the theory and practice that evolved in industrial engineering discipline.
The situation can be corrected by developing machine based industrial engineering following Taylor's lead. As work study became a popular subject (even Barnes acknowledge the subject), "machine work study" can be the name given to machine based productivity improvement. It is actually machine based industrial engineering. It is redesign of machine, its tools and accessories and machining processes based on the data generated in the industrial practice. Cost data is an important industrial data and industrial engineering specially emerged as a discipline through its focus on engineering redesign based on cost data to reduce cost of production.
Machine Work Study – Man Work Study – Taylor’s Conceptualization of Scientific Study of Man-Machine Systems is a presentation done by Dr. K.V.S.S. Narayana Rao, Professor, (NITIE), in December 2015
Taylor (1911) “The Principles of Scientific Management” - Scientific management in a machine shop.
Taylor described the implementation of scientific management in a machine shop.
First Stage – Machine Related Improvements
The slide-rules developed for determining optimal speeds and feeds were used to determine the optimal speed and feed for every element of work done on this machine.
The Pulling power of the machine at its various speeds and feeds was determined.
The belt drive and pulleys of the machine were adjusted so that the machine can be run at the proper speed for each element.
The shape of tools was specified and the tools made of high-speed steel (already in use in the company) were properly dressed, treated, and ground.
After preparing the machine, tools and instruction cards in this way, the machinist was asked to work according to the new instruction card and all varieties of work were finished on the lathe and the times were recorded.
The gain in time was found to range from two and one-half times to nine times.
Handwork of Operators – Time and Motion Study
The change from rule-of-thumb management to scientific management involves, however, not only a study of machine effort, that is the proper speed for doing the work and a remodelling of the tools and the implements in the shop, but also study of human effort.
Hence elaborate analysis of the hand work was done.
Hand work depends upon the manual dexterity and speed of a workman, independent of the work done by the machine. On some machines, the time saved by scientific hand work was greater than that saved in machine-work.
Industrial Engineering Discipline - Neglected Machine Productivity Improvement
Industrial Engineering discipline has not developed a subject for analysis of machine related elements and over time the area got neglected. Facilities planning and Material Handling were included in IE programmes but they were also not integrated adequately with process improvement (productivity engineering) function adequately.
Early Authors on Scientific Management.
They recognized the machine work improvement.
Bertrand Thompson (wrote between 1914 to 1920)
Scientific management was implemented - first, by determining with the aid of experienced investigators the best materials, equipment, machine methods and man methods to use. In many machine shops, it was the practice to issue to the workman an instruction card containing directions as to feeds, speeds, tools, and times of machine elements and also the manual elements with their standard times in their proper sequence. The combination of machine work improvement and man work improvement resulted in substantial improvements in machine shop work
Malcolm Keir (1918)
Scientific management advocates development of science and a thorough investigation of the work involving analysis of materials, equipment, environment; motion study, fatigue study, time study; research into the laws of health, psychological experiment and community improvement.
Farquhar (1919)
Difference between improving impersonal means of production and human effort in production.
In his paper, he took up for description first, the mechanical phase - the more purely impersonal aspects - divorced so far as possible from the human factor. He stated that the two were to a certain extent interactive, yet sufficiently distinct to warrant separate treatment.
H.B. Maynard (1927 & 1937)
H.B. Maynard, a popular industrial engineer of the next generation, was a coauthor of "Time and Motion Study and Formulas for Wage Incentives" Stewart McKinley Lowry, Harold Bright Maynard, Gustave James Stegemerten, McGraw-Hill Book Company, Incorporated, 1927. In that book "operation analysis" was described. It evaluated various aspects of the production system including the machine. Maynard and Stegemerten later authored "Operation Analysis" in which they discussed each and every step of operation analysis in a separate chapter. This book should have been included in IE curriculums.
One Conclusion
There is a need for developing a subject of machine element analysis in IE curriculum based on the definition. "Industrial engineering is system efficiency engineering and human effort engineering" by Narayana Rao.
Machine Work Study – Industrial Engineering Analysis of Machine in Production System - A Presentation
Machine Work Study – Man Work Study – Taylor’s Conceptualization of Scientific Study of Man-Machine Systems is a presentation done by Dr. K.V.S.S. Narayana Rao, Professor, (NITIE), in December 2015
Taylor (1911) “The Principles of Scientific Management” - Scientific management in a machine shop.
Taylor described the implementation of scientific management in a machine shop.
First Stage – Machine Related Improvements
The slide-rules developed for determining optimal speeds and feeds were used to determine the optimal speed and feed for every element of work done on this machine.
The Pulling power of the machine at its various speeds and feeds was determined.
The belt drive and pulleys of the machine were adjusted so that the machine can be run at the proper speed for each element.
The shape of tools was specified and the tools made of high-speed steel (already in use in the company) were properly dressed, treated, and ground.
After preparing the machine, tools and instruction cards in this way, the machinist was asked to work according to the new instruction card and all varieties of work were finished on the lathe and the times were recorded.
The gain in time was found to range from two and one-half times to nine times.
Handwork of Operators – Time and Motion Study
The change from rule-of-thumb management to scientific management involves, however, not only a study of machine effort, that is the proper speed for doing the work and a remodelling of the tools and the implements in the shop, but also study of human effort.
Hence elaborate analysis of the hand work was done.
Hand work depends upon the manual dexterity and speed of a workman, independent of the work done by the machine. On some machines, the time saved by scientific hand work was greater than that saved in machine-work.
Industrial Engineering Discipline - Neglected Machine Productivity Improvement
Industrial Engineering discipline has not developed a subject for analysis of machine related elements and over time the area got neglected. Facilities planning and Material Handling were included in IE programmes but they were also not integrated adequately with process improvement (productivity engineering) function adequately.
Early Authors on Scientific Management.
They recognized the machine work improvement.
Bertrand Thompson (wrote between 1914 to 1920)
Scientific management was implemented - first, by determining with the aid of experienced investigators the best materials, equipment, machine methods and man methods to use. In many machine shops, it was the practice to issue to the workman an instruction card containing directions as to feeds, speeds, tools, and times of machine elements and also the manual elements with their standard times in their proper sequence. The combination of machine work improvement and man work improvement resulted in substantial improvements in machine shop work
Malcolm Keir (1918)
Scientific management advocates development of science and a thorough investigation of the work involving analysis of materials, equipment, environment; motion study, fatigue study, time study; research into the laws of health, psychological experiment and community improvement.
Farquhar (1919)
Difference between improving impersonal means of production and human effort in production.
In his paper, he took up for description first, the mechanical phase - the more purely impersonal aspects - divorced so far as possible from the human factor. He stated that the two were to a certain extent interactive, yet sufficiently distinct to warrant separate treatment.
H.B. Maynard (1927 & 1937)
H.B. Maynard, a popular industrial engineer of the next generation, was a coauthor of "Time and Motion Study and Formulas for Wage Incentives" Stewart McKinley Lowry, Harold Bright Maynard, Gustave James Stegemerten, McGraw-Hill Book Company, Incorporated, 1927. In that book "operation analysis" was described. It evaluated various aspects of the production system including the machine. Maynard and Stegemerten later authored "Operation Analysis" in which they discussed each and every step of operation analysis in a separate chapter. This book should have been included in IE curriculums.
One Conclusion
There is a need for developing a subject of machine element analysis in IE curriculum based on the definition. "Industrial engineering is system efficiency engineering and human effort engineering" by Narayana Rao.
Machine Work Study Case Study - SMT Machine - Production Line - Productivity Improvement
What should we pay attention to when using a dispensing machine?
Published on August 19, 2022
Ralph Barnes - Machine Work Study Indication
What are the question that can be asked and evaluated in machine work study? - Barnes
Based on the questions suggested Barnes:
1. What is the operation?
2. What is the purpose of the operation?
3. What is the transformation of the material required?
4. What is the equipment now used?
5. What are the alternative equipments?
For example see the U20 Die Casting Machine
Product of 25 ton class can cast at parting injection
U Series Features
Less air trapped in the metal flow during die fill, it makes the casting parts excellent.
With parting injection system, it makes less re-melting material and can reduce a lot of re-melting cost.
Sprueless system it makes die opening stroke shorter.
You can consider U20 die casting machine instead of the one now being used in 25 ton class die casting.
You can see the benefit quantified in http://www.iim-delhi.com/upload_events/Presentation_KaushiksInternational.pdf
6. What are the cutting tools now used?
7. What are alternative cutting tools?
See the case studies of benefits of alternative cutting realized by many machining organizations.
Cutting Tool Alternatives for Machine Process IE - Cost and Productivity Benefits
8. What are the cutting parameters now used?
9. What are the alternative cutting parameters?
10. What should be the best specifications for machine and machine parameters for the minimum cost that does the required material transformation reliably and accurately?
Six sigma studies in machining process provide number of examples of determining the best specification for cutting parameters.
In doing six sigma studies, "Boundary Limit Strategy" has to be used.
Technical constraints which act as boundary limits are to be first ascertained, and then, bearing in mind economic considerations, working point within these limits are to be determined using optimization studies. direct analytical, evolutionary optimization or six sigma optimization.
See for examples Six Sigma in Machining Processes
Maynard provided a list of questions for machine work study in his book "Operation Analysis." These questions are at more elementary levels.
Questions on Machine, Equipment and Tools - Maynard and Stegemerten (1939)
Barnes has focused on the motions and activities of the operators and he mentioned machines in a brief manner. It is Maynard and Stegemerten who documented the practice of Westinghouse in the book "Operational Analysis." In this description of productivity improvement many aspects related to machine are covered first and then only at the end of standardizing the machine related aspects, motion study, the work of the operator is investigated.The following questions are suggested by Maynard and Stegemerten for logical analysis of machine, equipment and tools.
About Machine
2. Would the purchase of a better machine be justified?
About Fixture - Workholding
3. Can the work be held in the machine by other means to better advantage?
4. Should a vise be used?
5. Should a jig be used?
6. Should clamps be used?
7. Is the jig design good from a motion-economy standpoint?
8. Can the part be inserted and removed quickly from the jig?
9. Would quick-acting cam-actuated tightening mechanisms be desirable on vise, jig, or clamps?
10. Can ejectors for automatically removing part when vise or jig is opened be installed?
11. Is chuck of best type for the purpose?
12. Would special jaws be better?
13. Should a multiple fixture be provided?
14. Should duplicate holding means be provided so that one may be loaded while machine is making a cut on a part held in the other?
About Cutting Tools
15. Are the cutters proper?
16. Should high-speed steel or cemented carbide cutting tool be used?
17. Are tools properly ground?
18. Is the necessary accuracy readily obtainable with tool and fixture equipment available?
19. Are all operators and machines provided with the same tools?
20. Can a special tool be made to improve the operation?
About Inspection or Dimension Checking
21. If accurate work is necessary, are proper gages or other measuring instruments provided?
22. Are gages or other measuring instruments checked for accuracy from time to time?
Because of the wide variety of tools available for different kinds of work, this list could be extended almost indefinitely with specific questions. Foundries, forge shops, processing industries, assembly plants, and so on all have different kinds of tools, and different questions might be asked in each case. The list given above, drawn up principally and by no means completely for machine work, will indicate the kind of searching, suggestive questions that should be asked.
A special list might well be drawn up by each individual plant to cover the questions on the kind of machines, machine tools that are used in its own work.
Machine Work Study.
Check List - Process (Machine Use) (Louis Davis) :
1. Is proper machine being used?
2. Can machine be loaded and unloaded while running?
3. Can automatic shut-off be used?
4. Can operator control more than one machine?
5. Can speed be increased?
6. Cali machine be operated with foot-operated lever to substitute for hand motions?
7. Are stops being used?
8. Can operation be done in multiple units?
9. Is machine properly maintained?
10. Can design of apparatus be changed to reduce use time?
Industrial Engineering - Important Ideas and Principles - Work Methods Design and Work Simplification - LOUIS E . DAVIS
Machine Work Study - Introduction - YouTube Video Presentation
_____________________________________
Machine Work Study: Methods, Techniques and Tools - YouTube Video Presentation
__________________________________
Machine Work Study - Lessons
Study of machine work has to begin with production engineering lessons related to the machine in use. In this series of lessons of machine tool work is covered.Metal Cutting Theory - Productivity Focus Lessons
50
Metal Cutting Processes - Industrial Engineering and Productivity Aspects
https://nraoiekc.blogspot.com/2020/07/metal-cutting-processes-industrial.html
News - Information for Maintenance Operation Analysis
https://nraoiekc.blogspot.com/2020/07/news-information-for-maintenance.html
Machine Tools - Industrial Engineering and Productivity Aspects
52
Machining Cutting Tools - Industrial Engineering and Productivity Aspects
53
Machine Tool Toolholders - Industrial Engineering and Productivity Aspects
54
Metal Cutting Temperatures - Industrial Engineering and Productivity Aspects
55
Machining Process Simulation - Industrial Engineering and Productivity Analysis
56
Cutting Tool Wear and Tool Life Analysis - Industrial Engineering and Productivity Aspects
57
Surface Finish - Industrial Engineering and Productivity Aspects
58
Work Material - Machinability - Industrial Engineering and Productivity Aspects
59
Machine Rigidity - Industrial Engineering and Productivity Aspects
60
Machining Time Reduction - Machining Cost Reduction - Industrial Engineering of Machining Operations
61
Machine Tool Cutting Fluids - Industrial Engineering and Productivity Aspects
62
High Speed Machining - Industrial Engineering and Productivity Aspects
63
Design for Machining - Industrial Engineering and Productivity Aspects
Process Planning of Machining
64.
Production Process Planning - Foundation for Production
65.
Assembly Design - Process Planning & Industrial Engineering Perspective
66.
Technical Drawings - Important Guidelines - Process Planning and Industrial Engineering
67.
Selection of Metal Removal Processes - Initial Steps - Process Planning and Process Industrial Engineering
68.
Fixturing and Clamping the Work Piece - Process Planning and Process Industrial Engineering
69.
Determining Depth of Cuts for Multiple Cuts - Process Planning and Process Industrial Engineering
70.
Selecting Cutting Speed - Process Planning and Process Industrial Engineering
71.
Selecting a Machine for the Operation - Process Planning and Process Industrial Engineering
72.
Selecting Tools for a Machining Operation - Process Planning and Process Industrial Engineering
73.
Process Industrial Engineering - Methods and Techniques
74.
Part 2: Process Industrial Engineering - Methods and Techniques
75.
Process Charts, Maps, Diagrams and Operation Analysis Sheet
77.
Toyota Style Industrial Engineering - Toyota Process Maps - Process Improvement - Process Metrics
78.
Process and Operation Productivity Analysis and Engineering
80.
Machine Work Study - Productivity Improvement Based on Machine and Machine Work Redesign
Process Industrial Engineering - Methods and Techniques
74.
Part 2: Process Industrial Engineering - Methods and Techniques
75.
Process Charts, Maps, Diagrams and Operation Analysis Sheet
77.
Toyota Style Industrial Engineering - Toyota Process Maps - Process Improvement - Process Metrics
78.
Process and Operation Productivity Analysis and Engineering
80.
Machine Work Study - Productivity Improvement Based on Machine and Machine Work Redesign
Process Analysis for Productivity Improvement Opportunities
82
83
84
85
86
87
Production Machine/Equipment Productivity Analysis - Processing Operation Productivity Analysis Step
88
89
90
91
92
93
Productivity Engineering
101
Machine Work Study - Machine Time Estimation - Machine Time Reduction - Machining Cycle Time Optimization
Now the machine shop process industrial engineering that includes all focus areas of industrial engineering is developed.
Machine Shop Process Industrial Engineering
Productivity Science
Productivity Science of Machining - Stephenson - Agapiou
IE Measurements
Process Industrial Engineering - Process Alternatives and Economic Analysis of IE Proposed Alternatives
IEOR - Optimization in Machining Processes
IE Statistics Optimization - Six Sigma Method
Human Effort Engineering in Machine Shop
Applied Industrial Engineering in Machine Shop
https://nraoiekc.blogspot.com/2020/04/machine-shop-process-industrial.html
Lesson 80 of Industrial Engineering ONLINE Course
Handbook of Standard Time Data for Machine Shops
https://babel.hathitrust.org/cgi/pt?id=mdp.35128001400272&view=1up&seq=15
Machining Data Handbook
https://archive.org/details/DTIC_ADA092695/page/n25/mode/2up
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26 Jan 2023
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Updated on 9.8.2024, 5.7.2024, 28.1.2022, 19.8.2022, 30.5.2022, 16 Oct 2021, 18 August 2021, 16 May 2021, 1 March 2021, 5 August 2020, 23 May 2020, 11 May 2020,
16 November 2019, 4 July 2019,
27 June 2019,
Machine work study is an important activity in industrial engineering. The time taken for machining is to be minimized with the objective of reducing machine cost component of total cost of a part or full product.
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Another interesting point I observed from the book, Toyota Kata. It is similar to what I am advocating now - Machine work study, Human effort study. Rother gives in process analysis - Is machine capacity sufficient? Is the process stable? How many operators are required for the stable process. It indicates that both machine and operator are to be studied and analyzed. Thank you, Mike Rother. Your industrial engineering background is evident.
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