The essential oil of fresh aerial part of Ammoides atlantica Coss. et Dur. (Apiaceae), obtained by hydrodistillation in a Clevenger-type apparatus, was analyzed by GC-MS. Twenty compounds were characterized representing 97.9 % of the essential oil with safranal (17.9 %), endo-borneol (17.6 %), chrysanthenone (15.5 %), filifolone (12.1 %) and camphor (11.8 %) as main components.

The cutting parameters such as the cutting speed, feed speed, and the chip thickness have huge effects on the machining quality and the productivity rate. The optimal choice of these parameters gives a perfect machining without risks and with high productivity rate. The proposed problem tries to minimizing two nonlinear objectives functions: the machining time and the machining cost under several constraints. The well-chosen of conform optimization methods to resolve this problem gives a quick and reliable decision. The genetic algorithms permit the treatment of non-linear functions. They allow a good exploitation in the field of research as well as the non feasible field is not eliminated but sanctioned with high fitness values and a good exploration by the diversification operations that improve the solution quality.