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Table 5

Mean GRG for the input parameters.

Control factor Average grey relational grade Delta (max-min) Rank

  Level 1 Level 2 Level 3    
Compacting pressure, A (MPa) 0.4788 0.5538 0.6323 0.1535 2
Sintering temperature, B (°C) 0.4721 0.5697 0.6230 0.1509 3
Graphite content, C 0.6941 0.5536 0.4172 0.2769 1

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