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[MW:6707] Reg Range of Amperage in WPS

By Materials & Welding
Dear All,

Can any one help me!

PQR Qualified with an amperage of min 350 and max 550.
As per AWS D1.1, Allowable Variation in Amperage for WPS is 10 %.
How should i consider this 10%.

Case 1
Should i Consider lesser 10 % lesser to PQR's Min Amperage and
Greater side 10 % to the max PQR Amperage.

Case 2
Or Should i consider 10% min max of Average of PQR Value.

Which case is correct?

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