Rounding off & Decimal Precision Issue

Hi Pioneers,

In Ax2009, Production module, I have the facility to enter the BOM quantity as 0.0003 (upto 4 digits), now my question is that, as per my requirement, I need to increase it to 6 digits, for example 0.000003. Is it good practice to change the decimal precision in form level in ax 2009 ?

When I enter 0.0003, then system automatically roundoffs to nearest value 0.000 & when I enter 0.0006 then the system roundoffs to nearest value 0.001. May I stop this facility / functionality in ax 2009 ? How can I stop ?

Thanks