Because the format of the IR can't use with IFF conditions you can format within the IFF condition
=IIF(Compound_Amount > 0.5, Format(Compound_Amount, "0.000" ) , " Below Limit")
0.5 in the example can be replaced by a custom field contend like Bernhard Etrich described it just before or by a report parameter or any variable which has defined.
=Val(Trim(Choose(1,Split(Sample_DilutionFactors, ";" ))))
(originally posted in OpenLAB Forum: https://zohodiscussions.com/openlabcdsforum#Topic/68030000000137005
2014 September 24 by Uwe Kirchhoff)