Six Sigma Capable

hi JB,
U r close enough!…” If u’r 6 sigma limits are below USL & above LSL then process is capable or defect free (in simple words)”  but most importantly if u’r 6 sigma limits = 50% of u’r tolerance limits then u’r process is 6sigma capable.
…easy isn’t it!
bye
 
 

stan baby…
i’m sure u’v made it very clear (as an adult) for someone who is “NEW” at this!!!
man… u’r so matured…!!!
OK…I shall make it even more simple…just for u:
” If u’r estimated part to part variation, estimated @ 99.73% Confidence Level viz. nothing but u’r 6sigma lies within u’r customer or process specific tolerance i.e. Specification Limits i.e below the USL or above LSL (basically within the boundary) and also if u’r 6 sigma = 50% of the Tolerance, then u can treat me b’cos u’r process has achieved 6sigma!!”
textless formula…again just for u:
6sigma = 50% (USL-LSL)
sigma = R-bar/d2
R-bar= Average of ranges collected over 24 time blocks with 3 or 5 readings in every timeblock
d2= constant (depends on sample size = 3, 5 etc /time block)
Zusl = (USL – overall avg) / 3sigma
Zlsl = (overall avg – LSL)/3 sigma
Cpk = (Zusl/3, Zlsl/3)
simple isn’t it….?!! 
 

I thought ZLSL= (Average – LSL)/std. deviation i.e. sigma.
 
Is it
(average – LSL)/3sigma  ?
I was searching for formula to confirm.
Thanks,