Sierra, S. Garcin, G. Knaak, M. Lievin, C. Pekeler, M. Vignette, G. JACoW Geneva, Switzerland 978-3-95450-178-6 10.18429/JACoW-SRF2015-THPB096 English 1370-1372 THPB096 controls status FEL cryomodule SRF Contribution to a conference proceedings 2015 2015-12 http://dx.doi.org/10.18429/JACoW-SRF2015-THPB096 http://srf2015.vrws.de/papers/thpb096.pdf In this paper we described lesson learned during the production of Fundamental Power Couplerfor the European XFEL accelerator and different steps necessaries for obtaining a rate of 8 couplers a week. From the manufacturing of individual components up to the RF conditioning. This paper also propose some possible ways to be optimized for a future mass production of such components. With comparison of processes and adaptation which could benefit to an increase rate or a more secure program. Some of them which could be studies from the coupler definition to the manufacturing process in order to obtain a stable and possible increased rate or lower cost of production by decreasing the risks on programs. This analysis is based on a current production of more than 500 couplers