Capital Budgeting

I have a client, who wants to implement capital budgeting using fixed asset modulel.

Initially, I created a budget for the category and period for a specified budget book.

Next, I tried to create asset for that period/category more than the amount BUDGETTED.  I presumed that the asset will not be created as the actual amount is more than the BUDGETED amount.

I could create the asset with out any issue.

My question.......Capital budgeting check  is mandatory before creating asset or not , meaning , if we can create assets in corp book for that budget book,  more than the budgetted amount.