Then Six Sigma quality theory is a statistically based quality management system. Its essence is to continuously reduce variance and pursue higher quality.

而六西格玛理论是一套建立在统计学基础上的质量管理系统模式，它的本质是不断减少偏差，持续追求高品质。

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While consumers are spending less on toilet paper, they remain fussy in theory at least when it comes to paper quality.

虽然消费者在卫生纸上的花费减少了，但从理论来看，他们至少对于纸的质量仍然很挑剔。

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Private involvement should, in theory, improve the quality of projects that get undertaken.

ECONOMIST: Investing in infrastructure: A question of trust | The

We found five interrelated criteria that form a new blueprint for how corporations can maximize their investments in CSR: business-based social purpose, clear theory of change, quality and depth of information, concentrated effort, and partnering with experts.

FORBES: The Five Elements of the Best CSR Programs

Traditional media could hold on to its business model, in theory, by delivering higher quality content than real time content, because, naturally, real time content would not have the benefit of editing, pruning, selecting, and tweaking.

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