SIPOC

SIPOC is a structured, high-level process mapping tool used in process improvement and quality management methodologies such as Lean and Six Sigma. The acronym stands for Suppliers, Inputs, Process, Outputs, and Customers, representing the key elements that define any business process.

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The main purpose of SIPOC is to provide a clear, end-to-end overview of how a process works—starting from the suppliers who provide resources, through the steps that transform those resources, to the customers who receive the final outputs. It helps teams ensure that everyone shares the same understanding of what the process does, who is involved, and how value is created.

Here’s what each element represents in more detail:
 

• Suppliers: The people, departments, or organizations that provide the necessary materials, information, or resources for the process to begin.

• Inputs: The specific items or information supplied that are required to execute the process.

• Process: The set of key steps or activities that transform inputs into outputs. Typically summarized in 4–7 main steps.

• Outputs: The products, services, or deliverables that result from the process and are provided to customers.

• Customers: The recipients of the process outputs—either internal (within the organization) or external (outside customers).
   

A SIPOC diagram is usually created early in a project to define scope and boundaries, identify key stakeholders, and highlight improvement opportunities. By focusing on the high-level flow rather than detailed steps, SIPOC helps teams align on the “big picture” before diving into root cause analysis or detailed process mapping.

In summary, SIPOC provides a simple yet powerful framework for visualizing and communicating how work flows through an organization, ensuring that all inputs, activities, and outcomes are clearly connected and understood.