how values are coming in qbew table

hi sap experts,

my Project Stock Does not Valuated With Standard Cost , i search and understand that value of LBWST(current valuation strategy) field in QBEW table is 2( Value from Production Order Cost Estimate) , now i want to know where can i define this field,how can i change it to 3.

check PRPS-KZBWS and see its value is m.

know i want to know how values are coming in qbew table? what can i do that the value of QBEW-LBWST be 3. what can i do that When the QBEW segment is initially created the price be the same that we have in MBEW?

thanks for your helps.