UNIVERSITÄT 
  D U I S B U R G   
   E S S E N 
  Campus Duisburg 
  Fakultät für Ingenieurwissenschaften 
  Abteilung Maschinenbau 
  Institut für Produkt Engineering  
  Transportsysteme und -logistik 
  Keetmanstr. 3-9 
  47058 Duisburg 
   
  Telefon: 0203 379-2785                                               Prof. Dr.-Ing. Bernd Noche 
  Telefax: 0203 379-3048 
  eMail: bernd.noche@uni-due.de 
                                      ABC-/XYZ Analysis 
                                                   Introduction 
  tul                                                                                              Quelle: Powerpoint-Folien: Uta Horstmann 
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    A short definition of ABC-Analysis 
          
           The ABC-Analysis represents a simple method 
          of material classification in respect of  value and 
                                         quantity. (G. Wöhe)  
          
          
          
         Expressed in a more general way it is a process in order to identfy 
         important kinds of customers, suppliers or articles.  
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    The Pareto principle 
           
          The so called Pareto principle indicates that for many phenomenons the 
          following is valid: 
          80 % of effects are reached by 20 % of causes. 
           
          The principle traces back to Vilfredo Pareto (Italian economist) who, related to 
          Italy, had noticed that 80 % of property belonged to 20 % of the Italian 
          population.  
                                                                   
                                                                  Vilfredo Federico Damaso 
                                                                  Pareto 
                                                                  1848 - 1923 
                                                                   
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           However, the rule often is misunderstood: 
           It seems that 80 % + 20 % = 100 %.  
           But it can also be valid that: 
           80 % of effects are traced back to 10 % of causes. 
            
           The principle can also be applied recursively, and not only used for 20% of the 
           reasons : 
            
           e.g.  64-4 Rule:                     e. g. (80 – 16) %  (20 – 16)% 
                     96-36 Rule:                e. g. (80 + 16) %  (20 + 16)% 
                     64-4 Rule:                 e. g. from (80•80/100)% - (20•20/100)% 
                     51,2-0,8 Rule:  e. g. from (80•80•80/10000)% - (20•20•20/10000)% 
            
            
                                                                                                                                 Source: Wikipedia