Table 7.

Drawn conclusions from the performed t-tests.

Condition	Comments
Lcut influence	For low values of s and f, Lcut has the most influence. However, as the values of s and f increase, its influence on the surface quality becomes less prominent. In the case of S75F150L5 vs. S75F150L15, surface quality is not affected by the Lcut. For cases with conditions S100F150L15 and above, there is a noticeable blend of the influence of all three parameters together.
f influence	f is the most influential parameter on the surface quality and this influence is more pronounced when accompanied by an increasing in s within the setup. However, due to phenomena such as three-body abrasion, some outliers are to be seen, since the milling setup has proven to be catastrophic to TiAlYN-coated tools.
s influence	s has proven to be the most sensitive parameter, when in conjunction with f and Lcut. In some cases, it is visible that the increase in s leads to a different variance in the measured values, but sometimes it does not. Nonetheless, for the most extreme setups carried out, s is a very influential parameter regarding surface quality.