Usage of quality management tools
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  • 1. Production engineering and operations management. Practical session 5.- Usage of quality management tools Management board Carlos Ribera Bernhard Schuster Ángeles Vázquez Longhao Xiang Sigrid Holleis Patrick Wisinger
  • 2. Usage of quality management tools
    • In this task we are going to use three tools of total quality management to describe the ability to satisfy stated or implied needs in MAN company.
    • The tools we selected are the Scatter Diagram, the Cause-and-Effect Diagram and the Flowchart.
  • 3. Scatter Diagram
    • A Scatter Diagram is a graph of the value
    • of one variable vs. another variable.
    • Used to show different statistics or values for the company.
  • 4. Scatter Diagram in MAN In this example the Scatter Diagram shows the relation of the technique level with the number of trucks produced in the MAN company.
  • 5. Cause-and-Effect Diagrams
    • Cause-and-effect diagrams (also called fishbone diagrams, Ishikawa diagrams  or Fishikawa) are diagrams that show the causes of a certain event -- created by Kaoru Ishikawa (1990).
    • Used to find problem sources/solutions
  • 6. Model of Cause-and-Effect Diagrams
  • 7. Practice in MAN GROUP
    • Steps:
    • Identify problem to correct
    • Draw main causes for problem as ‘bones’
    • Ask ‘What could have caused problems in these areas?’ Repeat for each sub-area.
  • 8. Step 1:Identify problem to correct
    • Problem: Insufficient of market expansion
    Low product qualification rate
  • 9. Step 2:Draw main causes for problem as ‘bones’ Typical categories used in manufacturing
    • Machine (technology)
    • Method (process)
    • Material (Includes Raw Material, Consumables and Information.)
    • Man Power (physical work)/Mind Power (brain work):  Kaizens , Suggestions
    • Measurement (Inspection)
    • Milieu/Mother Nature (Environment)
    • Management/Money Power
    • Maintenance
  • 10. Step 2:Draw main causes for problem as ‘bones’ Low product qualification rate Machine Process People Management Production Environment
  • 11. Step 3 : Ask ‘What could have caused problems in these areas?’ Repeat for each sub-area. Machine Process Man Materials Lack of training Lack of experience Conditioning Poor test Engineering lacks training Wrong prog used Old equitment Contact Issue Misoperation Volume Lot Quality Low product qualification rate
  • 12. Flowchart
    • The flowchart is a process diagram that describes the steps in a process.
    • This diagrammatic representation can give a step-by-step solution to a given problem.
  • 13. Flowchart in MAN The speedometer dial is bowed Is the dimension of the disc correct? Yes No Assembly fault? No Yes Material failure? No Yes Supplier of the disk? No Yes Temperature? Yes Manufacture problem? No Yes Change the bowed speedometer Solve the problem in the factory The problem is solved