Capability
Capability is the total range of inherent variation in a stable process. It is determined
using data from control charts. The control charts shall indicate stability before
capability calculations can be made. Histograms are to be used to examine the distribution
pattern of individual values and verify a normal distribution. When analysis indicates a
stable process and a normal distribution, the indices Cp and Cpk can be calculated. If
analysis indicates a non-normal distribution, advanced statistical tools such as PPM
analysis, will be required to determine capability. If control charts show the process to
be non-stable, the index Ppk can be calculated. CE Mark
CE Mark is a visible declaration by the manufacturer (or his
representative, importer, etc.) that the equipment which is marked complies with all the
requirements of all the applicable European Union (EU) directives.
CFT
Cross Functional Team.
Characteristic Matrix
An analytical technique for displaying the relationship between process parameters and
manufacturing stations.
Conformance
Means that the material meets the customer's specifications and requirements.
Control Plans
Control Plans are written descriptions of the systems for controlling parts and processes.
They are written by suppliers to address the important characteristics and engineering
requirements of the product. Each part shall have a Control Plan, but in many cases,
"family" Control Plans can cover a number of parts produced using a common
process. Customer approval of Control Plans may be required prior to production part
submission.
Corrective Action Plan
A Corrective Action Plan is a plan for correcting a process or part quality issue.
Cost of Quality
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Critical Characteristics
Critical Characteristics are those product requirements (dimensions, performance tests) or
process parameters that can affect compliance with government regulations of safe
vehicle/product function and which require specific supplier, assembly, shipping, or
monitoring and inclusion on Control Plans. Critical characteristics are identified with
the inverted delta symbol.
Customer Satisfaction Index
(American)
Introduced in 1994 by University
of Michigan and American Society for Quality - CSI
measures customer satisfaction at national level. CSI has been on a continual decline from
1994 through 1997 suggesting that quality improvements are not keeping pace with consumer
expectations. |
