PhD, Industrial and Operations Engineering University of Michigan, 2015MSE, Industrial and Operations Engineering University of Michigan, 2011BSIE, Industrial and Manufacturing Engineering, Management Minor Kettering University, 2008

My research interest include integer programming and combinatorial optimization, healthcare systems engineering, Six Sigma and process improvement, applying lean enterprise to healthcare and manufacturing applications, optimization of disassembly and remanufacturing systems.


  • National Science Foundation Graduate Research Fellow

Selected Publications

  • Riggs, R.J., Jin, X., and Hu, S.J., “Two-stage sequence generation for partial disassembly of products with sequence dependent task times,” to appear in Procedia CIRP 2015.
  • Riggs, R.J., Battaïa, O., and Hu, S.J., “Disassembly line balancing under high variety of end of life states using a joint precedence graph approach,” to appear in Journal of Manufacturing Systems 2015.
  • Riggs, R.J., and Hu, S.J., “Disassembly liaison graphs inspired by word clouds,” Procedia CIRP, 7, 521-526, 2013.