Data types and basic definitions(英文版)(ppt 21页)
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Data types and basic definitions（英文版）内容提要：
Terminology (Continued)：
Importance of Variation:
1、Our goal is to reduce variation.
2、We cannot eliminate it, but we can control it.
3、We use statistics to quantify it and understand its causes.
Reducing variation results in:
1、Predictable, controllable output.
2、Improved yields.
3、Increased profitability.
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