Statistical Process Control is an a

Statistical Process Control is an analytical decision making tool which allows you to
see when a process is working correctly and when it is not. Variation is present in
any process, deciding when the variation is natural and when it needs correction is
the key to quality control.

Results (English) 3:

统计过程控制是一种分析决策工具，它可以让你在正确的过程和不正确的过程中看到它。在任何过程中都存在着变化，决定什么时候的变化是自然的，当它需要纠正的时候，才是质量控制的关键。