Рет қаралды 256
Variation is the basic principle of Statistical Process Control (SPC).
One problem with mother nature is “Variability” i.e. No two things are alike and Everything is different.
PROCESS VARIATION TYPES
There are two types of process variation present in the manufacturing process :
1. Common causes : Also called as Chance causes (natural).
2. Special Causes : Also called as Assignable cause (un natural).
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