The experiments show that precise process time-quota can be obtained rapidly with proper samples selected, continuous self-study and self-organization in system.

实验表明，只要选择适当的样本，并在系统中不断进行自学习与自组织，就能快速获得准确的工序时间定额。

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To ensure that quota samples mirror the voting intentions of the nation, polling firms need to use controls which are good at distinguishing Conservative from Labour voters.

ECONOMIST: Why the polls got it wrong last time | The

All the polling firms selected their samples using a technique known as quota sampling.

ECONOMIST: Why the polls got it wrong last time