This document discusses various aspects of quality control including: 1. It defines quality as the degree to which a product meets customer needs based on factors like design, production, and inspection. 2. It describes types of inspection as preventive (finding defects before production) and corrective (finding defects after production). 3. It defines quality control as processes used to ensure uniform, acceptable product quality and analytical quality control as procedures to ensure consistent, accurate lab test results. 4. It discusses statistical quality control using parameters and statistics to analyze process variations, good manufacturing practices to ensure quality products, and quality assurance to implement quality system activities so requirements are fulfilled.

1. By:Gaurav Gunjan
B.Tech Final Year
Dept. of Mechanical Engineering
1

2. Contents:-
1. Quality
2. Types Of Inspection
3. Quality Control
4. Types Of Quality Control
5. Analytical Quality Control
6. Statistical Quality Control
7. Good Manufacturing Process
8. Quality Assurance
9. Conclusion

3. What Is Quality ?
The quality of a product is the “degree of perfection” i.e. the
totality of features and characteristics of a product or service
that bears on its ability to satisfy the needs of the customers.
The quality of a product depends
upon a number of factors such as design and
specifications, production process, quality of raw materials
used, quality of machines and equipments, man power
expertise and skill and the inspection.

4. Types of Inspection:
Depending upon the objective, inspection can be of
two types, namely, preventive and corrective.
The primary purpose of it is to
discover the defective parts that have already been
manufactured and prevent their use in the final
product.
The idea is to prevent the
inferior parts from further processing down the
production line in order to reduce the cost of
production.

5. What is Quality Control?
Quality control is defined as an industrial management
technique by means of which products of uniform
acceptable quality are manufactured.
It is a Process or system for monitoring the
quality of laboratory testing, and the accuracy and
precision of results.

6. What is the goal of QC?
 To detect
SIGNIFICANT errors
rapidly
 Report out good results
in a timely manner
 Be cost effective and
simple to use
 If there is an error,
identify the source of
the error

7. What is an error???
A wrong answer.
A significant error is
one that changes the
diagnosis
Wrong answers can
be caused by random
errors or by
systematic errors

8. Types of Errors
Random Systematic
Fluctuations Reagent problem
Temperature Device problem
Personnel

9. Types of Quality Control:-
Internal Quality Control
When a company institutes protocol to check their system, this is
called internal quality control.
External Quality Control
When products or data is sent to an outside business not affiliated
with the company, this is external control. One example of external
control is in food production.

10. Analytical Quality Control
Analytical quality control, commonly shortened
to AQC refers to all those processes and procedures
designed to ensure that the results of laboratory
analysis are consistent, comparable,accurate and
within specified limits of precision.
In well managed laboratories,
AQC processes are built into the routine operations
of the laboratory often by the random introduction
of known standards in to the sample stream or by
the use of spiked samples.

11. Statistical Quality Control
(SQC)
A process by which a product/service is checked
during its creation using certain set parameters and
statistical techniques to measure and analyze the
variation within the process.
WHAT IS IT USED FOR:
To monitor the consistency of product/service
quality and maintain processes to a fixed target as
designed.
To drive improvement actions within an
organization.

12. Advantages of Statistical Quality Control (SQC):
The advantages of SQC are as follows:-
(1) It ensures control, maintenance and improvement in the
quality standards.
(2) It provides better quality assurance at lower cost of
inspection.
(3) It reduces the wastages of time and materials to the
minimum.
(4) The very presence of SQC policy in an organization
improves and makes them quality conscious.
(5) It provides basis for resolving differences among the
various interests in the organization.

13. What can be controlled using SQC?
VARIABLES ATTRIBUTES
Variable Measures are Attributes are
those that can be measured characteristics that are
on a continuous scale, for assessed by judgement
example i.e. have two states such
length, time, weight.... as right or wrong, looks
OK or not OK.

14. Good Manufacturing Practice
A good manufacturing practice (GMP) is a
production and testing practice that helps to ensure
a quality product.
Basic concepts of all of these guidelines to
safeguard the health of the patient as well as
producing good quality medicine, medical devices
or active pharmaceutical products.

15. Quality Assurance
Quality assurance (QA) refers to the systematic
activities implemented in a quality system so that quality
requirements for a product or service will be fulfilled.
QA includes management of the quality of raw
materials, assemblies, products and components, services
related to production, and management, production and
inspection processes

16. Conclusion:
When it comes to our focus, we understand
that when quality control makes sure the end
product meets the quality
requirements, quality assurance makes sure
that the process of manufacturing the product
does adhere to standards.
So Quality control can be noted as a reactive
process.

17. ANY
QUERY