Often the fact that an advanced, highly productive machine like cnc machining center or cnc gantry milling machine is now present in the shop could affect the harmonious flow of production, causing bottlenecks later, when the purpose of purchasing the machine was to overcome those problems at an earlier production stage. Machine tools have even been purchased in the past without due regard for the components they must manufacture, or without correct assessment of future work.This latter point is not often considered, as many companies are all too concerned with today's production problems rather than those of the future. 

Taking this theme a little further, in a volatile market a feasibility study should perceive not only the short and medium term productivity goals, but also the long term ones, as it is often the long term trends of productive capability which are the most important if a company is to amortise their costs. When highly sophisticated plant such as an FMS is required. 

It can be several years from its original conception before this is a reality on the shop floor, and a company's production demands may have changed considerably in the mean time. If, for any reason, the wrong machine/s has/have been purchased, or more likely, something has been overlooked during the feasibility study, then the "knock-on effect" of this poor judgement is that it will have cost the company dearly and, at the very least, any future study will be looked on by the upper management with disdain and scepticism.

Thus, think twice when make selection of cnc milling machine.