Studies suggest that when organizations place a higher value on their employees, through the implementation of high performance management systems (HPMSs), their business performance improves. Those that have conceptualized the HPMS construct in the service sector have limited validity for the restaurant industry. To fill this gap this paper presents the research methods used to develop a construct for a HPMS within the casual restaurant sector of the US hospitality industry. The exploratory qualitative methodology that combines a variety of data collection techniques including interviews for the pilot study, the Delphi method and secondary data collection to establish the most salient dimensions of a HPMS in the casual restaurant industry, are discussed. Thirteen key HPMS dimensions are identified; training and skill development, employer of choice, information sharing, selectivity in recruiting, measurement of HR practices, promotion from within, quality of work/life, diversity, incentive pay based on performance appraisal, participation and empowerment, employee ownership, self-managed teams and high wages. In addition, an overarching HPMS construct is developed as a first step in identifying the link between HR practices and restaurant performance.