SAP ABAP Data Element QQRKCPKC (Process Capability Index (cpk))
Hierarchy
SAP_APPL (Software Component) Logistics and Accounting
   QM-PT-BD-SPL (Application Component) Samples and SPC
     QM01 (Package) QM graphics and SPC
Basic Data
Data Element QQRKCPKC
Short Description Process Capability Index (cpk)  
Data Type
Category of Dictionary Type D   Domain
Type of Object Referenced     No Information
Domain / Name of Reference Type QSTATWERTC    
Data Type CHAR   Character String 
Length 16    
Decimal Places 0    
Output Length 16    
Value Table      
Further Characteristics
Search Help: Name    
Search Help: Parameters    
Parameter ID   
Default Component name    
Change document    
No Input History    
Basic direction is set to LTR    
No BIDI Filtering    
Field Label
  Length  Field Label  
Short 10 cpk 
Medium 15 cpk 
Long 20 cpk index 
Heading 16 cpk 
Documentation

Definition

The process capability index cpk is a measurement of the expected fraction of nonconforming units in the process. The greater the value, the smaller this share.

For characteristic values that follow a normal distribution pattern, the capability index is calculated as follows:

cpk = min(USL - x-bar) (x-bar - LSL) / 3*s

USL and LSL are the upper and lower specification limits of the tolerance range, respectively. s and x-bar are estimations of the expected value and the standard deviation of the original value distribution, respectively.

History
Last changed by/on SAP  19960124 
SAP Release Created in