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Six Sigma · Green Belt

Six Sigma: Define Phase Tools

Project charters, SIPOC diagrams, voice of the customer, and CTQ trees used in the Define phase.

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What is a project charter?
A document that formally authorizes a project, defining its purpose, scope, objectives, and key stakeholder roles.
What are the main purposes of a project charter?
To formally authorize the project, establish project boundaries, define success criteria, and gain stakeholder commitment.
What does project scope mean in a charter?
A clear statement of what is included and excluded from the project, defining its boundaries and limits.
What is the role of a project sponsor in a charter?
The executive or senior leader who authorizes the project, provides resources, removes barriers, and holds accountability for success.
What does SIPOC stand for?
Suppliers, Inputs, Process, Outputs, Customers.
What is the main purpose of creating a SIPOC diagram?
To map the process and its key stakeholders, establishing process boundaries and understanding the supplier-to-customer flow.
What do Suppliers represent in a SIPOC diagram?
External or internal sources that provide inputs required for the process to operate.
What are Inputs in a SIPOC diagram?
The materials, information, resources, or data that feed into and enable the process to run.
What is the Process element in a SIPOC diagram?
The core activities, steps, or transformations that convert inputs into outputs.
What are Outputs in a SIPOC diagram?
The products, services, or results produced by the process.
Who are Customers in a SIPOC diagram?
The recipients or users of the process outputs, either internal or external to the organization.
Why is SIPOC mapping important in the Define phase?
It clarifies process scope, identifies key stakeholders, establishes system boundaries, and creates shared understanding before detailed improvement work.
How does a SIPOC diagram help establish process boundaries?
By clearly identifying where the process starts (first input source) and ends (final customer), preventing scope creep.
What is Voice of the Customer (VOC)?
The documented needs, wants, expectations, preferences, and complaints expressed by customers about a product or service.
What is the primary purpose of capturing Voice of the Customer?
To understand what customers truly value so the project can define requirements that deliver real customer value.

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