Multiple equipment in Single Maintenance order with Cost settlement to all equipments

Hi PM Masters,

My requirement is to attach multiple equipments to single maintenance order. While doing so the costs incurred in any way (component, operation etc) should be settled to corresponding equipment.

I have referred similar kind of posts in SCN where it is mentioned to use user exit IWO10027 , but I couldn't get a clear idea on this.

Please help me on this regard.