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Six Sigma DMAIC Control Phase at Starbucks

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Abstract

This paper examines the Control phase — the fifth and final step of the Six Sigma DMAIC methodology — as applied to Starbucks. It discusses how standardized documentation, updated standard operating procedures (SOPs), and employee training form the foundation of sustained process improvement. The paper further addresses process monitoring strategies, including both observational spot checks and statistical control, as tools for identifying deviations and driving corrective action. Management training and cross-organizational buy-in are highlighted as critical success factors, particularly given Starbucks' mix of company-owned and franchised locations operating at a global scale.

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What makes this paper effective

Applies an abstract quality-management framework (DMAIC) to a concrete, recognizable real-world organization, making the analysis immediately grounded and relatable.
Balances qualitative and quantitative monitoring strategies, acknowledging that both observational checks and statistical control are necessary for a global enterprise.
Addresses practical organizational challenges — such as differences between company-owned stores and franchises — rather than treating implementation as uniform or straightforward.

Key academic technique demonstrated

The paper demonstrates applied framework analysis: it takes a well-defined methodological framework (Six Sigma DMAIC) and systematically maps its components onto a specific business context. Each element of the Control phase — documentation, monitoring, training, statistical oversight — is explained conceptually and then connected to Starbucks' operational realities, showing the student's ability to translate theory into practice.

Structure breakdown

The paper moves logically through the Control phase in sequence: it opens by establishing why control matters for replicability, then addresses documentation and SOP dissemination, process monitoring mechanisms, management training and buy-in, and finally statistical control and project closure. Each paragraph builds on the previous, following the internal logic of the DMAIC framework rather than an arbitrary organizational choice.

Introduction to the DMAIC Control Phase

To maintain process improvements, it is necessary to rewrite standard operating procedures (SOPs) and ensure that staff are properly trained in the new techniques. One of the key elements of Six Sigma is that a company should not only improve its processes, but that those improvements must be replicable. The only way this is possible is if every person involved in the process is aware that the process has changed and is capable of executing it correctly. DMAIC Phase 5 — the Control phase — is the mechanism by which the new process is made replicable.

Documentation and Standardization

There are several key steps in the Control phase to ensure that new methods are standardized. The first is documentation. It is critical that the new process is properly documented, capturing all key aspects of the workflow. Documentation allows improvements to be recorded in a durable, accessible form. However, having thorough documentation is not sufficient on its own — it is also necessary to make that documentation available to all relevant parties. The updated SOP must be recorded and then transmitted: either by making it directly accessible or by training employees on its contents. By doing this, the organization is in a much stronger position to ensure that the new, improved process is repeated consistently throughout the entire organization.

In addition to documentation, a process monitoring plan is essential. Within the DMAIC framework, the process monitoring plan is the mechanism by which the company ensures that the new process has been adopted across the organization (Weisenfelder, 2013). There are several ways this can be accomplished. One approach is direct observation — randomized checks to confirm that employees are following the prescribed process. Statistical monitoring is another valuable tool: if the new process is expected to yield specific results, this form of monitoring can identify where those results have and have not been achieved, enabling further investigation.

Process Monitoring Strategies

For example, a difference in metrics between company-owned stores and franchise locations may point to disparities in training and implementation. The Control phase can incorporate both prescriptive consequences for non-compliance and a reward system that recognizes excellent execution — particularly in cases where issues were identified and resolved, improving the process by addressing problems that were not originally anticipated (Six Sigma Material, 2017).

By identifying key metrics that measure the success of the implementation, it becomes easier for Starbucks to control rollout. The company can investigate deviations and determine precisely where implementation is breaking down. These investigations can incorporate both qualitative and quantitative elements.

2 Locked Sections · 245 words remaining

58% of this paper shown

Management Training and Organizational Buy-In · 135 words

"Manager training drives consistent cross-organizational deployment"

Statistical Control and Project Closure · 110 words

"Statistical oversight identifies outliers and closes the project"

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Key Concepts in This Paper

DMAIC Control Six Sigma Process Monitoring Standard Operating Procedures Statistical Control Management Training Organizational Buy-In Process Replicability Franchise Compliance Continuous Improvement