Okay, let’s break it down. John has a diverse skill set that includes Operational Excellence, Lean Manufacturing, and Data Science. These skills are in demand across various industries, particularly in the Dallas-Fort Worth Metroplex. Considering his certifications from Microsoft and Accenture Management Consulting, he likely commands a higher rate. However, his location and the fact that he has a broad range of skills without being a specialist in one area might bring his rate down slightly. Looking at the market, data science professionals with similar certifications can charge $150-$250 per hour. Lean Six Sigma experts can charge $100-$200 per hour. Operational Excellence professionals can charge $120-$220 per hour. Taking all this into account, I estimate John’s hourly rate to be around $125, which is slightly below the average for data science professionals but above the average for operational excellence professionals.