problem with kb21n

Hi all Expert

i need to make every month reclassifications of Activity Type on a lot of cost center

for the work around we have create a job whit a call transaction of kb21n

seder AT receiver quantity

1°row Cost center1 Type1 Cost center dummy 10h

2° row Cost center Dummy Type2 Cost center1 10h

there is a standard tool to make reclassifications of Activity Type ?