Start Routine for transformation

Hi

I'm loading approx. 10 years of data from flatfile(CSV). I need to create a start routine in transformation.

In my case 90% machines required 1 to 5 faulty parts to be replace and 10% machines required 6 to 10 faulty parts to be replace.

If I make 10 copies of ZSPR_PART(Part Name) & ZUNIT_CST(Unit Cost) infoobjects then copy 6-10 are empty because 90% objects are having 1-5 spare parts are replaced.

Now I need to create a start routine which load the Part Name and Unit Cost even 1 Part Name & Unit Cost available or 10 Part Names & Unit Costs in a single ZSPR_PART(Part Name) & ZUNIT_CST(Unit Cost) infoobjects.

Not having that good knowledge on ABAP. So, help needed in writing a routine.