" We chose the quality because the luck had become too expensive. " (Jean Abraham) " In the running in the quality, there is no finishing line. " (David Kearns) " The quality is never an accident; it is always the result of an intelligent effort. " (John Ruskin)

The number of participants should be about 6 +/- 2 (+ the organizer). If the number of participants is too weak, then a certain number of competences would be omitted. Moreover, if the number of participants is too important, the organizer’s management could be complicated. Too great discordances would likely appear in the experiment group