Control Chart

Control Chart

1. Use

   • To monitor process variation
   • • To diferenciate betwen c’mon and special causes
   • • To assess are comunicate process preormance.

2. Variation

   • • C’mon caucess
   • • Special cauces

3. Categories

   • Attribute
     • Elapsed time
     • Temperature
     • Radiation dose
   • Variables
     • Height
     • Weight
     • Volume

4. •“P” charts

   • Llcl = P+Zσp
   • Lcl = P- Zσp
   • Z = number of standand deviations (3)
   • P = sample of proportion defective
   • Σp = standar deviation of sample

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