Massimo Appiotti and
Arne Buthmann February 26, 20100
Initially Six Sigma process improvement projects followed four phases: Measure, Analyze, Improve and Control. Today, some companies still omit the Define phase because a project’s definition is seen as mainly management work. Following this logic, the same might be true for Control: ensuring that the process improvements are implemented and monitored is only a business responsibility. “MAI” would be enough as a project roadmap if business did its job. The Define and Control phases are seen as an integral part of the Six Sigma project roadmap, however, not in order to shift the responsibility for their execution to the project leader but to build the bridge between the business and the project. Define is the initialization and handover of the project by the line function to the project organization. Control is the handover in the other direction.
If business does not play an integral role at the beginning and the end of each project problems occur:
It is, therefore, key to the success of the project that business takes the lead in the Define and Control phase. The figure below shows the necessary involvement of the business (sponsor and process owner) and project leader (Belt) in a Six Sigma project along the DMAIC phases.
The ordinary tasks of the sponsor and process owner in Define are:
If the business leaders do not complete these activities it may indicate the business has not determined the worth of the project. The sponsor and process owner must provide the “what” and “why” of the project. The project leader will define the “how” following the DMAIC methodology. Too often, the focus during the Define phase switches too quickly from the business problem to the process without project leaders understanding how a process improvement would contribute to a strategic business goal. The Define phase should be more business-centered than process-centered.
The following Define tools help determine the business value of a project:
Relationship Between Business and Project Leader

As shown in the figure above, the involvement of the business has to start in Improve – the business people create, evaluate and select the improvement solutions and implement them therefore taking ownership. In Control and beyond, the business should be back in a leadership position. The sponsor and process owner need to ensure that the original business idea is realized. The business has to guarantee that the results of the defined KPIs and business case are achieved and sustainable. It is not possible to sustain business results on a project level.
The main tasks of the business people in Control are for the sponsor:
Additionally, the process owner must communicate with and influence the people involved in the process to facilitate change, for only if people change behavior can the results be sustainable. The process owner and his team must implement the process changes and monitor the KPIs on a frequent basis. Finally, the financial analyst needs to confirm and validate the financial results achieved.
In the Control phase the business needs to answer the questions “When will the changes be implemented?” and “How much is the finally realized business case?”
The most important Six Sigma tools in the Control phase are:
Instead of building a complex deployment-monitoring dashboard to boost the results of deployment, a business must do two things: 1) stop sending project leaders to training before their sponsors are trained in their role in the process and the philosophy behind the method and 2) stop asking company Belts to provide the business case, the goal definition, the implementation follow up or other business related deliverables – it is not their job. Six Sigma projects are business projects and what needs to be done in Define and Control is first and foremost a business responsibility.
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