Asset purchase and asset creation

Team,

Currently we are following the below steps to purchase asset and creating them in maintenance module

1.Create Expense item 100031006

2.Enter Asset clearing account

3.Create PR and PO and receipt the asset item

4.Create maintenance asset in EAM (Independently) and do the maintenance

in this case we don't have any direct link between the asset what purchased and for the asset we do maintenance

Here I am curious to understand how the asset purchase happens and business scenario for the asset group

1.Create Asset group

2.Create PR and PO for the asset group

3.While receipting the asset group enter serial number and receipt it