Software reuse is known to be generally effective in reducing development and maintenance time and cost as well as increasing quality. In this paper, the effects of reuse on software quality in an industrial setting are empirically investigated within the framework of three different case studies. Throughout this study, we worked with Turkey's leading defense industry company Aselsan's software engineering department. We collected and calculated reuse and quality metrics as well as performance measures of individual embedded software modules and staff productivity rates. By analyzing these measurements, we developed suggestions to further benefit from reuse through systematic improvements to the reuse infrastructure and process.