Six Sigma is a process of analyzing defects (anything outside a customer's specifications) in a production (manufacturing) process, with a goal of no more than 3.4 defects per million "opportunities" or chances for a defect to occur. The basic idea is to measure defects, analyze why they occurred, and then fix the issue and repeat. There is a process for improving existing processes and a slightly modified version for new processes or major changes. Motorola pioneered the concept in the mid-1980s, and many companies have since followed their examples to improve quality.
This certification is different from the others in this list, as it is not IT specific. Instead, it is primarily focused on manufacturing and producing better quality products.
There is no organization that owns Six Sigma certification per se, so the specific skills and number of levels of mastery vary depending on which organization or certifying company is used. Still, the entry level is typically Green Belt and the progression is to Black Belt and Master Black Belt. Champions are responsible for Six Sigma projects across the entire organization and report to senior management.
It's always a good idea to take stock of your skills, your pay, and your certifications. To that end, John Hales, Global Knowledge VMware instructor, has outlined 15 of the top-paying certifications for 2014. With each certification, you'll find the average (mean) salary and a brief description.
Based on the 2014 IT Skills and Salary Survey conducted by Global Knowledge and Penton and completed in October 2013, the rankings below are derived from certifications that received the minimum number of responses to be statistically relevant. Certain certifications pay more but are not represented due to their exclusive nature. Examples include Cisco Certified Internetworking Expert (CCIE) and VMware Certified Design Expert (VCDX). This was a nationwide survey, and variations exist based on where you work, years of experience, and company type (government, nonprofit, etc.).