م .احمد عادل
05-12-2005, 09:13 PM
Objectives
To introduce the subject of statistical process control (SPC) by
considering the basic concepts.
To define terms such as quality, process and control.
To distinguish between design quality and conformance.
To define the basics of quality related costs.
To set down a system for thinking about SPC and introduce some basic
tools.
1.1 The basic concepts
SPC is not really about statistics or control, it is about competitiveness.
Organizations, whatever their nature, compete on three issues: quality,
delivery and price. There cannot be many people in the world who remain to
be convinced that the reputation attached to an organization for the quality of
its products and services is a key to its success and the future of its employees.
Moreover, if the quality is right, the chances are the delivery and price
performance will be competitive too.
What is quality?
The word ‘quality’ is often used to signify ‘excellence’ of a product or service
– we hear talk about ‘Rolls-Royce quality’ and ‘top quality’. In some
manufacturing companies quality may be used to indicate that a product
conforms to certain physical characteristics set down with a particularly
‘tight’ specification. But if we are to manage quality it must be defined in a
way which recognizes the true requirements of the ‘customer’.
Quality is defined simply as meeting the requirements of the customer and
this has been expressed in many ways by other authors:Statistical Process Control, Fifth Edition
http://www.megaupload.com/?d=JS4RGYWN
To introduce the subject of statistical process control (SPC) by
considering the basic concepts.
To define terms such as quality, process and control.
To distinguish between design quality and conformance.
To define the basics of quality related costs.
To set down a system for thinking about SPC and introduce some basic
tools.
1.1 The basic concepts
SPC is not really about statistics or control, it is about competitiveness.
Organizations, whatever their nature, compete on three issues: quality,
delivery and price. There cannot be many people in the world who remain to
be convinced that the reputation attached to an organization for the quality of
its products and services is a key to its success and the future of its employees.
Moreover, if the quality is right, the chances are the delivery and price
performance will be competitive too.
What is quality?
The word ‘quality’ is often used to signify ‘excellence’ of a product or service
– we hear talk about ‘Rolls-Royce quality’ and ‘top quality’. In some
manufacturing companies quality may be used to indicate that a product
conforms to certain physical characteristics set down with a particularly
‘tight’ specification. But if we are to manage quality it must be defined in a
way which recognizes the true requirements of the ‘customer’.
Quality is defined simply as meeting the requirements of the customer and
this has been expressed in many ways by other authors:Statistical Process Control, Fifth Edition
http://www.megaupload.com/?d=JS4RGYWN