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Productivity Analysis - Comparison of Current Process to Ideal or the Best Process has to be done from System level up to Element level.
Lesson 57 Surface Finish of Machined Surfaces - Industrial Engineering and Productivity Aspects
The following questions should be raised and answered regarding tolerance and finish:
1. What are the inspection requirements of this operation?
2. What are the requirements of the preceding operation?
3. What are the requirements of the following operation?
4. Will changing the requirements of a previous operation make this operation easier to perform?
5. Will changing the requirement of this operation make a subsequent operation easier to perform?
6. Are tolerance, allowance, finish, and other requirements necessary?
7. Are they suitable for the purpose the part has to play in the finished product ?
8. Can the requirements be raised to improve quality without increasing cost?
9. Will lowering the requirements materially reduce costs?
10. Can the quality of the finished product be improved in any way even beyond present requirements?
Observe the relation between succeeding operations is being evaluated in this case also.
In value engineering analysis techniques, Miles has indicated that giving a cost estimate for each tolerance will bring out the cost created by tolerance and it can be compared with the value implication of tolerance.
Hamilton Church
It is interesting to note that Hamilton Church in his 1914/18 books, includes limits and tolerances as coordinating mechanisms for independent production of components by different operators. Designers have to specify limits and tolerances to the extent required and should not increase cost of production by specifying tighter tolerances than required.
Productivity Analysis
Analysis if comparing the facts of the operation under observation with the ideal or best conditions possible to locate discrepancies. In the place best conditions, we can also think of known best practices or known better method. We may we compare the current practice in the situation with a better method that we know. Industrial engineers have to monitor environment continuously to know research developments, new method developments and news of successful new innovations (successes achieved by various companies in implementing new recommended methods). Then productivity analysis will be fruitful activity.
Productivity Analysis - Comparison of Current Process to Ideal or the Best Process has to be done from System level up to Element level.
Part of Main Topic: Analysis of Items in Operation Information Sheet
Tolerances and Surface Finish Productivity Analysis
Questions Indicated by Maynard (1939)
The following questions should be raised and answered regarding tolerance and finish:
1. What are the inspection requirements of this operation?
2. What are the requirements of the preceding operation?
3. What are the requirements of the following operation?
4. Will changing the requirements of a previous operation make this operation easier to perform?
5. Will changing the requirement of this operation make a subsequent operation easier to perform?
6. Are tolerance, allowance, finish, and other requirements necessary?
7. Are they suitable for the purpose the part has to play in the finished product ?
8. Can the requirements be raised to improve quality without increasing cost?
9. Will lowering the requirements materially reduce costs?
10. Can the quality of the finished product be improved in any way even beyond present requirements?
Observe the relation between succeeding operations is being evaluated in this case also.
In value engineering analysis techniques, Miles has indicated that giving a cost estimate for each tolerance will bring out the cost created by tolerance and it can be compared with the value implication of tolerance.
Value Analysis Technique 8. Get a Dollar Sign on Key Tolerances
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There are articles on how to assign tolerances to minimize costs. There are articles explaining the role of statistical tolerancing to reduce manufacturing costs.
Reducing manufacturing costs - the dynamic tolerance system - tolerance-cost optimization
There are articles on how to assign tolerances to minimize costs. There are articles explaining the role of statistical tolerancing to reduce manufacturing costs.
Reducing manufacturing costs: the dynamic tolerance system
Anselm Lorenzoni,Christopher Tielemann &Alexander Sauer
Cogent Engineering,
Volume 6, 2019 - Issue 1
Assembly Tolerance Design Based on Skin Model Shapes Considering Processing Feature Degradation
by Ci He, Shuyou Zhang, Lemiao Qiu, Xiaojian Liu and Zili Wang
Appl. Sci. 2019, 9(16), 3216;
Save manufacturing costs with Inventor Tolerance Analysis
Tolerance analysis is about finding the right balance between precision and manufacturing costs. Fully integrated in Inventor, tolerance analysis allows you to make better informed decisions about required manufacturing tolerances.
Autodesk
Nov 19 2019
From tolerance allocation to tolerance-cost optimization: a comprehensive literature review
Martin Hallmann, Benjamin Schleich & Sandro Wartzack
The International Journal of Advanced Manufacturing Technology volume 107, pages 4859–4912 (2020)
Understanding Statistical Tolerance Analysis
Updated on 27.8.2023, 24 August 2021, 14 September 2020
16 August 2020.
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