My MQCI quantity conversion does not match the expected conversion factor between two units of the same dimension, how can this be?

You perform a trial conversion for e.g. conversion group Q7A5:

The KG value for 3 000 TO is not calculated as 3 000 000 KG (as expected), but, as displayed above, as 2 999 999.916 KG.

Explanation: The conversion group is configured to utilize a calculation model (read the BCP Documentation Reference Manual -> Chapter 6.5. for details) which uses LTO as base conversion UoM for masses. In addition, UoM conversion factors are defined with ASTM Table 1 conversion factors (or SAP CUNI if not defined).
When converting between TO and KG, two conversion calculations (TO to LTO and LTO to KG) are performed. The two conversion factors applied are not perfectly symmetric (i.e. when multiplying the two factors with each other, the result is not exactly 1 000).
Depending on your requirements, you may want to select a different template conversion group which utilizes a different (i.e. metric) base conversion UoM set. Additional ASTM Table 1 one-step calculation functions (as defined in note 000055) may be considered for usage. Realistic rounding of the KG value may also be an option.  You should involve a certified QWCC for such a task.

 

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