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Le diagramme de Pareto est élaboré en plusieurs étapes :
• Déterminer le problème à résoudre.
• Faire une collecte des données ou utiliser des données
déjà existantes.
• Classer les données en catégories et prévoir une
catégorie "Divers" pour les catégories à peu d'éléments.
• Faire le total des données de chaque catégorie et
déterminer les pourcentages (par rapport au total).
• Classer ces pourcentages par valeur décroissante, la
catégorie "Divers" est toujours en dernier rang.
• calculer le pourcentage cumulé
1
• déterminer une échelle adaptée pour tracer le
graphique.
• placer les colonnes (les barres) sur le graphique, en
commençant par la plus grande à gauche
• lorsque les barres y sont toutes, tracer la courbe des
pourcentages cumulés
• distinguer trois classes A, B et C qui se distribuent de
la manière suivante :
• Classe A : Les données accumulant 80% de l'effet
observé
• Classe B : Les données accumulant les 15% suivants
• Classe C : Les données accumulant les 5% restants
2
https://www.youtube.com/watch?v=b-ZpSiuH_WA

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pareto.pdf

  • 1. Le diagramme de Pareto est élaboré en plusieurs étapes : • Déterminer le problème à résoudre. • Faire une collecte des données ou utiliser des données déjà existantes. • Classer les données en catégories et prévoir une catégorie "Divers" pour les catégories à peu d'éléments. • Faire le total des données de chaque catégorie et déterminer les pourcentages (par rapport au total). • Classer ces pourcentages par valeur décroissante, la catégorie "Divers" est toujours en dernier rang. • calculer le pourcentage cumulé 1
  • 2. • déterminer une échelle adaptée pour tracer le graphique. • placer les colonnes (les barres) sur le graphique, en commençant par la plus grande à gauche • lorsque les barres y sont toutes, tracer la courbe des pourcentages cumulés • distinguer trois classes A, B et C qui se distribuent de la manière suivante : • Classe A : Les données accumulant 80% de l'effet observé • Classe B : Les données accumulant les 15% suivants • Classe C : Les données accumulant les 5% restants 2