Page 120 - Six Sigma Advanced Tools for Black Belts and Master Black Belts

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References 105
operations research techniques may be the answer. QFD allows the user to make sure
that the solution developed fulfills all the requirements. Operations research involves
the use of mathematical techniques to model and analyze the problem, so that the
best (optimum) course of action, under the restriction of limited resources, may be
determined.

8.5 CONCLUSION AND RECOMMENDATIONS

Current and future reality trees are powerful tools used as part of the under the total
TOC package. They incorporate some useful ideas which we can borrow and work
into the Six Sigma system. Some recommendations follow.
1. CRT is a good define phase tool for breaking problems down into a few well-defined
root causes which we can use the normal Six Sigma tools and methodology to solve
effectively. It is particularly effective for transactional projects where problems are
not well defined.
2. The CRT is a good project selection tool and can even be included in Champion
training. It is especially effective for transactional projects as it helps to drill down
the negative effects experienced by Champions to one or more well-defined root
causes. Each of the root causes can be a project.
3. Include the FRT in the improve phase as it can help in solution generation and in
qualitatively checking the effectiveness of the solution. This will be of great help
for projects that are impossible or inappropriate for such techniques as DOE.

REFERENCES

1. Goldratt, E.M. and Cox, J. (2004) The Goal. Great Barrington, MA: North River Press.
2. Goldratt, E.M. (1999) Theory of Constraints. Great Barrington, MA: North River Press.
3. Cohen, L. (1995) Quality Function Deployment. Reading, MA: Addison-Wesley.
4. Dettmer, H.W. (1997) Goldratt’s Theory of Constraints: A Systems Approach to Continuous Im-
provement. Milwaukee, WI: ASQ Quality Press.
5. Dettmer, H.W. (2003) Strategic Navigation: A Systems Approach to Business Strategy. Milwaukee,
WI: ASQ Quality Press.