By Kerri Simon
When learning the Six Sigma methodology, we often get caught up in the 'rules' and the 'correct' use of Quality tools. In a true Six Sigma project, the methodology provides an important framework to follow to achieve the best improvement results. However, within this framework and equipped with a thorough understanding of the principles behind the methodology, you should feel able to use and modify Quality tools as necessary to make progress. Additionally, the tools provide excellent stand-alone helpers in any type of problem solving.
Thus, the appropriate application becomes more critical for effectiveness than correctness. Make the tools work for you, should be your mantra. As a BB or MBB in your organization, your ability to adapt a tool to fit the immediate needs of your Six Sigma project or the project of others will go a long way to demonstrate that Quality can be integrated into everyone's day-to-day job. People will come to see that outside the bounds of a rigorous project, there is unlimited opportunity to apply concepts or tools from Six Sigma. It's simply a way to get work done.
Of course, this doesn't mean that you can start using 2-sample t tests for analyzing discrete data (some rules maintain the integrity of the results the tool leads to), but it does mean that the categories of a fishbone can be adapted to any particular situation. For example, if a group is considering how to increase productivity, they could use a fishbone not as a cause & effect diagram, but as a way to visually display and categorize brainstormed solution ideas. They may use categories that represent different ways to deal with tasks/work responsibilities, such as:
- Eliminate redundancies
- Outsource
- Use technology
- Don't do it anymore
Another example would be to use the payoff matrix to prioritize improvement ideas within your group for increasing productivity. In this 4-block matrix, the x-axis is traditionally 'ease of implementation,' and the y-axis is typically 'impact.' Maybe for your use, you would rather specify the cost (or speed, or ease of implementing, etc.) on the x-axis. Make the tool work for you!
| Impact | high | |
| low |
| high | low |
| Cost |
In summary, there is no disputing that the rigor of the Six Sigma methodology must be adhered to for maximum results when improving processes. Within the methodology, there are often opportunities to make discretionary choices as to the appropriate application or modification of a particular Quality tool. Further, outside of a Quality project, the tools and concepts of Six Sigma may find many additional appropriate and effective applications. Make the tools work for you!
