If the limits in IEC 61340 -5-1 are exceeded, the ESD control program shall include a tailoring. Tailoring is accomplished by evaluating the applicability of each requirement for the specific application. Upon completion of the evaluation, requirements may be added, modified or deleted. Tailoring decisions, including rationale and technical justification, shall be documented. (IEC 61340-5-1 5.1.3 Tailoring).
An example of this may be that the resistance of a floor exceeds the parameters of the IEC 61340 standard (ie greater that Rg < 1,0 × 109) If you can show that your controls are fit for purpose and keep the electro static discharge sensitive device safe by not exceeding the HBV of 100V.
