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Methodology of the Parameter Diagram (P-Diagram)

1. Objective (Why?)
The Parameter Diagram (P-Diagram) is ablock diagramwhich shows the connections between differentparameters of a system.

It is the ideal starting point of the FMEA: System elements und their functions aredescribedandvisualizedin a simplistic manner

The P-Diagram includes the followingcomponents and relations:

Fig. 1: System parameters, FMEA (Source: Dietz Consultants)

Fig. 2: Detailed block structure (source: Dietz Consultants)

Fig. 3: Parameters, content and influence (source: Dietz Consultants)

Fig. 4: Use in FMEA (Source: Dietz Consultants)

2. Procedure (How?)
1. Definition of the system and identification ofinput and output parameter

  • Transfer from Boundary Diagram resp. Interface Matrix (if applicable)
  • Method can also be used for the sub-systems

2. Description ofsystem function(s)

  • Preferably technical, precise and quantifiable expression, relating to material-, energy and signal flows: “To convert manual force and movement into cutting force and movement“, “To convert paper without holes into paper with holes“

3. Systematic collection of potentialnoise parametersof the 5 (or more) categories

4. Systematic collection ofcontrol parameters

  • These must appear in FMEA as product characteristics resp. process characteristics, or as system elements
  • You can also extrapolate preventive measures from here

Fig. 5: Parameter diagram, FMEA (Source: Dietz Consultants)

Fig. 6: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 7: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 8: Parameter diagram, FMEA Failure Mode and Effects Analysis (source: Dietz Consultants)

Fig. 9: Parameter diagram, FMEA failure mode and effects analysis (source: Dietz Consultants)

Fig. 10: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 11: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 12: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 13: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 14: Parameter diagram, FMEA (source: Dietz Consultants)

Fig. 15: Parameter diagram, FMEA (Source: Dietz Consultants)