Dear God, for the ASME a few questions please

Great God, for a few questions ASME ask:
1 table change consumables groups and parent material groups are additional important factors why not important factor?
2.QW-253 described, the meaning of the underlined sentence according to which of the following example: a: has a correct understanding of assessment of P-No1-1+P-No1-1, P-No2-1+P-No2-1, P-No1-1+P-No2-1 (now the products have done ASME, don't know how to write group category number right, please forgive me) need a reappraisal of existing b: P-No1-1+P-No1-1 products for P-No1-2+P-No1-2 assessment, and need reappraisal. The key is the combination of refers to the “ P-No” “ group ” collocation between (such as P-No1-1 “ 1 ” 1 and “ group ” combination of P-No2-1 is “ 2 ” 1 and “ group ” group A) or dissimilar material category number group as a whole collocation combination (such as P-No1-1+P-No2-1, P-No2-1+P-No2-2 such collocation form)? This is not well understood.