Introduction to Quality Engineering / Quality Control

Quality Control Introduction,
Definition and concept of quality,
Quality control,
Set up policy and objectives of quality control
Quality of design and quality of conformance
Compromise between quality & cost
Quality cost and planning for quality

1. Anjuman-I-Islam’s, Kalsekar Technical Campus
PROF AFAQAHMED
QUALITY
CONTROL

2. Quality control
Quality control is a management system for initiati
ng and coordinating:

–Quality development, quality maintenance and qu
ality improvement in the various departments of d
esign and manufacturing, for achieving the twin o
bjectives of:
1. Economical production
2. Customer satisfaction
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3. Definition
ASQC – Quality means the totality of features and chara
cteristics of a product or service that bear on its ability t
o satisfy given needs
Quality is Fitness for USE (Juran)
Quality is conformance to requirement (CORSBY)
The efficient production of the quality that the market ex
pects (DEMING)

From customer’s perspective, quality of a good or servic
e is fitness for use of it

Customer satisfaction for the price of the product
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4. Quality

Dimensions of Product Quality

Performance (will the product do the intended job?)
Reliability (how often the product fails?)
Durability (how long the product lasts?)
Serviceability (how easy is to repair the product?)
Aesthetics
Features (what does the product do?)
Perceived quality (what is the reputation of a company or its
products?)
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5. Objectives / Importance of Q C
1. Improvement of quality
2. Reduction of scrap and rework
3. Efficient use of men and machines
4. Economy in use of materials
5. Removing production bottle-necks
6. Decreased inspection costs
7. Reduction in cost per unit
8. Scientific evaluation of quality and production
9. Quality caution at all levels
10. Reduction in customer complaints
11. To decide about the standard of quality of a product
that is easily acceptable to the customer
12. To check the variation during manufacturing
13. To prevent the poor quality product reaching to
customer
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6. Quality Characteristics
Quality of Design

Quality of Conformance

 Quality of Performance

Availability

Customer Service

7. Quality by Design (QbD)

It is a concept first outlined by well-known qual
ity expert Joseph M. Juran who believed that q
uality could be planned, and that most quality c
rises and problems relate to the way in which q
uality was planned in the first place.
Quality by / of Design
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8.  Quality Aspects during Design

Aim to satisfy all needs of the Customer

Aware about Customer’s need

Manufacturability and Aesthetics

Ambiguity prohibited during production
Quality by / of Design
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9. 1. Establish the project design targets and goals.

2. Define the market and customers that will be targeted.

3. Discover the market, customers, and societal needs.

4. Develop the features of the new design that will meet the ne
eds.

5. Develop or redevelop the processes to produce the features.

6. Develop process controls to be able to transfer the new desi
gns to operations.
The Quality by Design model consists of the following
steps
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10. Quality of conformance is basically meeting the standards defi
ned in the design phase after the product is manufactured or w
hile the service is delivered.

This phase is also concerned about quality is control starting fr
om raw material to the finished product.

Three broad aspects are covered in this definition,

1.Defect detection
2.Defect root cause analysis
3.Defect prevention.

Quality of Conformance
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11. Anjuman-I-Islam’s, Kalsekar Technical Campus
Factors affecting on QOC
 Quality of Design & Specs
 Process Selection
 Procurement of raw mtl.
 Training & Skill of workforce
 Motivation and commitment
 Quality Culture
 Maintenance of an instruments
 Customer feedback

12. Anjuman-I-Islam’s, Kalsekar Technical Campus
1.Cost of Failure
a. External
i.Customer
ii.Supplier
b.Internal
i.Scrap
ii.Rework
iii.Manpower
2. Cost of appraisal
a. Inspection
b.Testing
3. Prevention Cost
a. Quality Improvement Planning
b.Training
c.Preventive Maintenance
Quality Cost / Cost of Quality