Learn Six-Sigma DMAIC and DMADV improvement approaches
Know working with basic quality tools with software (Minitab 2017,18,19 compatible) and excel
A knowledge of what all the lean tools means and how you can work with them.
Kaizen, RCA ,PDCA and A3, Smart goals, Pull System, VSM and process mapping, Andon, Jidoka(Autonomation), Work Standardization, Just In Time (JIT), Hosin-Kanri.
Lean defect and waste reduction tools like: 5S, 3M (Muda, Mura, Muri), Poka-Yoke or Mistake Proofing, Heijunka, Overall Equipment Effectiveness.
An overview how big companies are using lean and six-sigma to improve their business as a guidance for you to improve your business.
And this could be a bonus to introduce your skills in resume.