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Assembly Complexity Index Calculator

Design for Manufacturing and Assembly

DFA Design for Assembly Complexity Index Calculator

Cummins, Inc. engineering and manufacturer of Diesel engines and powertrains uses the following metric to determine an assemblies complexity index.

Figure 1 - DFA Complexity Factor

DFA Complexity factor equals the square root of the sum of N_p multiplied by the sum of N_i.

Eq. 1
DFC = ( Σ N_p · Σ N_i )^(1/2)

Declarations

N_p = Number of parts in assembly
N_i = Number of part-to-part interfaces

Smaller is better ( Minimize N_p and N_i )

From figure 1

N_p = 5
N_i = 8
DFC = 6.3

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Credits:

Kelly L. Bramble, ASEM S-GDTP. FAA A&P,
Engineers Edge, LLC