Explanation: 7-W questionnaire

  • What – needs doing?
  • Who – does it?
  • Why – does he do it?
  • What – method is used?
  • When – will it be done?
  • Where – is it being done?
  • Why – won’t it be done differently?

Related to the 7-W questionnaire is the principle of ‘Go to the source’ (Genkin-butso). This says, in the case of undesirable results or errors, to ask 5 times for the ‘why?’ to achieve a solution. It also says, however, that managers should get an clear picture of the on-site situation, for example a manufacturing process, and not just decide remotely.

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