“….you know the emotional/managerial parts in implementing QbD. A spectacular writer of reports. It is an art, and you are mastering it. I always feel lucky I have the opportunity to read your reports…enthusiastic, optimistic, yet with an honest feedback on usefulness and chance of success of the proposed program… a rare chemist having both education and practice in chemical engineering and synthetic chemistry as well as working experience in both…very attentive to details…you helped us improve our understanding of the chemical processes to make them robust and scaleable, address scale up issues with a chemical engineer eye, and use scale up simulation to accelerate process optimization, increase process knowledge and make the process more robust…trained us to make risk-based decisions. This is a change of culture and not just a one-off action writing the first Company guideline on implementation of QbD and aide-mémoire on crystallization… trained and supported us in the statistical design of experiments”