1. Method Name

SIPOC diagram

2. Alternative Names

COPIS (Reverse View from the Customer's Perspective), High-Level Process Map

3. Brief Description

SIPOC is a visual tool that provides a high-level summary of a process’s inputs and outputs. The name is an acronym for the following English words: Suppliers, Inputs, Process, Outputs, and Customers. It provides a quick and structured overview of the process and its main elements.

4. Purpose / When to Use

It is used in the initial phase (Define) of DMAIC projects or any improvement initiative to define the scope of the project. It helps the team align on an understanding of where the process begins and ends, who its key suppliers and customers are, and what the main inputs and outputs are. It’s a “bird’s-eye view” before you dive into the details.

5. Procedure / How to Apply It

Although the name is SIPOC, the diagram is best created in the order P-O-C-I-S, as this helps you think from the customer’s perspective:
1. P - Process: First, define the process you are analyzing. Describe it at a very high level, typically in 4–7 main steps.
2. O – Outputs: List the main outputs (products, services, data, decisions) that this process generates.
3. C – Customers: Identify who the customers are—those who receive and use the process’s outputs. They can be internal or external.
4. I - Inputs: List the key inputs (materials, information, resources, equipment) required to carry out the process.
5. S - Suppliers: Identify who the suppliers are—those who provide key inputs to the process.

6. A Real-World Example

Process: Making Morning Coffee
—S (Suppliers): Grocery store, Water utility, Power plant.
—I (Inputs): Coffee beans, Water, Electricity, Sugar, Milk.
—P (Process): 1. Grind the coffee. 2. Place the filter and coffee in the coffee maker. 3. Pour water. 4. Turn on the coffee maker. 5. Pour the coffee into a cup.
- O (Outputs): A cup of hot coffee, a used coffee filter.
- C (Customers): Me, my partner.

7. Benefits

- Quick team alignment: It helps all team members quickly understand the basic process framework and define the project boundaries.
- Prevents “scope creep”: A clearly defined scope at the outset helps prevent the project from expanding later on.
- Identifying stakeholders: Helps identify all key players (customers, suppliers) with whom communication is necessary.
- Simplicity: It is a very simple and quick tool that requires no special training.

8. Risks / Limits

- Over-simplification: SIPOC is not a detailed process map. It does not describe decision points, timing, or alternative flows.
- Getting bogged down in details: The team may start arguing about the details of the process instead of focusing on the big picture. The goal is not to map every single step.
- Overlooking key players: If the team does not pay sufficient attention to identifying all customers or suppliers, it may omit important requirements from the project.

9. Practical Tips

- Team-based creation: SIPOC is an ideal tool for a team workshop at the start of a project. Use a flip chart or whiteboard
.- Start with "P" (Process): Even though it’s pronounced "SIPOC," start with the process when creating the diagram to ensure clearly defined boundaries.
- Keep it to one page: The goal is a concise overview, not a detailed essay
.- Validate it with customers and suppliers: After creating a draft, check with actual customers and suppliers to ensure you’ve correctly identified their needs and what they provide.