Understanding the dynamics of workplace performance is crucial for organizations seeking to increase their competitive edge in a constantly changing economic environment. The Moroccan automotive industry provides a privileged field of study for examining the interactions between HRM practices and interpersonal relations in the workplace. This research highlights the need to subtly integrate motivational systems into HRM practices, taking into account the quality of the dyadic relationship between managers and employees. Such an approach fosters the creation of a work environment conducive to high and sustainable professional performance.