Dealing with the sheer size and weight of a large mold can be a big challenge. This often leads to excessive labor,

the need for special equipment, multiple setups and potential inaccuracies.
If the proper machining center is chosen for the manufacture of large molds, many of these problems can be reduced or eliminated, easing setup, change-over and other potential accuracy issues.

The biggest expense often associated with the manufacture of large molds is machinery cost. Machines capable of producing big molds are expensive, so having multiple machines, one for roughing and another for finishing, for example, is a large barrier to entry for this market. When the proper machine is chosen, it is capable of roughing and finishing, even in the same setup and without losing accuracy.