Smc flex controller

i need clarification about in smcflex controller why did used servicefactor its important to give are not can u tell me

Service Factor (S-F) When used on a motor nameplate, a number which indicates how much above the
nameplate rating a motor can be loaded without causing serious degradation (i.e., a motor with 1.15 S-F can produce 15% greater torque than one with 1.0 S-F) to adjust measured loads in an attempt to compensate for conditions which are difficult to measure or define.

Taken from Publication 150-UM008C-EN-P