# Proof of Concept (POC) Template: A Practical Guide

> A comprehensive template for creating Proof of Concept (POC) documents, focusing on hypothesis-driven experiments with clear success criteria and time-boxed execution.

Canonical page: https://www.coding-cloud.com/posts/poc-template-hypothesis-success-criteria
Last updated: 2026-10-10 16:55:16

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*Originally published May 7, 2025 by Claudio Teixeira on Coding Cloud.*

### 1. Introduction

#### 1.1 POC Objective / Hypothesis

- **Purpose:** Clearly state the primary technical question the POC aims to answer. This should be a specific, testable hypothesis.

- *Example: "To prove that we can achieve a sub-200ms response time for a vector search across 1 million documents using the XYZ vector database on a t3.medium instance."*

#### 1.2 Scope & Success Criteria

- **In Scope:** A bulleted list of the *only* things that will be built or tested. Be ruthless in cutting anything not essential to proving the hypothesis.

- *Example: "A command-line script that seeds the database and a single API endpoint that triggers the core logic."*
- **Success Criteria:** Measurable, binary (yes/no) outcomes that will determine if the POC was successful. This is the most important part of the document.

- *Example: "The API endpoint consistently returns a result in under 200ms over 100 test runs."*

#### 1.3 Out of Scope

- Explicitly list what is **not** being done to manage expectations. This prevents "scope creep" even at the POC stage.

- *Example: "User interface, authentication, error handling beyond basic logs, production deployment, or code scalability."*

### 2. Core Functionality & Technical Approach

- **Functionality to be Built:** Describe the minimal piece of software that needs to be created for the experiment.

- *Example: "A Python script that uses the `requests` library to call the third-party API, process the JSON response, and print the result."*
- **Conceptual Architecture:** A very simple diagram or description of the components involved. This is not a full C4 model, but a sketch to show how the pieces of the experiment fit together. A simple block diagram is often sufficient.

- *Example: `[Test Script] -> [Third-Party API] -> [Console Output]`*

### 3. Key Assumptions & Dependencies

#### 3.1 Assumptions

- What are we taking for granted for this experiment to be valid?

- *Example: "We assume the third-party API's sandbox environment accurately reflects its production performance."*

#### 3.2 Dependencies

- What external factors, tools, or access are required?

- *Example: "Access to the company's AWS sandbox account."*

### 4. Constraints

#### 4.1 Time Constraint

- The strict deadline for the POC. POCs should be heavily time-boxed.

- *Example: "This POC must be completed within 5 working days."*

#### 4.2 Technology Stack

- The specific technologies, libraries, or frameworks that will be used.

- *Example: "Python 3.10, FastAPI, Docker."*

### 5. Results & Conclusion

- **(To be filled out after the POC is complete)**
- **Outcome:** Was the POC successful based on the success criteria defined in 1.2? (Yes/No).
- **Key Findings:** A summary of what was learned. This includes quantitative results (e.g., "Average response time was 153ms") and qualitative insights (e.g., "The API's documentation was misleading regarding rate limits, requiring a workaround.").
- **Recommendation:** What is the next step?

- *Example: "Proceed with this technology for the MVP."*

````markdown
# Proof of Concept (POC): [Name of Concept]

### 1. Introduction
#### 1.1 POC Objective / Hypothesis
*   **Purpose:** Clearly state the primary technical question the POC aims to answer. This should be a specific, testable hypothesis.
    *   *Example: "To prove that we can achieve a sub-200ms response time for a vector search across 1 million documents using the XYZ vector database on a t3.medium instance."*
    *   *Example: "To validate that we can successfully integrate with the Stripe Connect API to handle multi-party payments for our specific transaction model."*

#### 1.2 Scope & Success Criteria
*   **In Scope:** A bulleted list of the *only* things that will be built or tested. Be ruthless in cutting anything not essential to proving the hypothesis.
    *   *Example: "A command-line script that seeds the database."*
    *   *Example: "A single, hardcoded API endpoint that triggers the core logic."*
*   **Success Criteria:** Measurable, binary (yes/no) outcomes that will determine if the POC was successful. This is the most important part of the document.
    *   *Example: "The API endpoint consistently returns a result in under 200ms over 100 test runs."*
    *   *Example: "A test payment is successfully processed and funds are correctly allocated to the connected test accounts."*

#### 1.3 Out of Scope
*   Explicitly list what is **not** being done to manage expectations. This prevents "scope creep" even at the POC stage.
    *   *Example: "User interface (UI) of any kind."*
    *   *Example: "User authentication or authorization."*
    *   *Example: "Error handling beyond basic console logs."*
    *   *Example: "Deployment to a production environment."*
    *   *Example: "Code scalability, maintainability, or test coverage."*

### 2. Core Functionality & Technical Approach
*   **Functionality to be Built:** Describe the minimal piece of software that needs to be created for the experiment.
    *   *Example: "A Python script that uses the `requests` library to call the third-party API, process the JSON response, and print the result."*
*   **Conceptual Architecture:** A very simple diagram or description of the components involved. This is not a full C4 model, but a sketch to show how the pieces of the experiment fit together. A simple block diagram is often sufficient.
    *   *Example: `[Test Script] -> [Third-Party API] -> [Console Output]`*

### 3. Key Assumptions & Dependencies
#### 3.1 Assumptions
*   What are we taking for granted for this experiment to be valid?
    *   *Example: "We assume the third-party API's sandbox environment accurately reflects its production performance."*
#### 3.2 Dependencies
*   What external factors, tools, or access are required?
    *   *Example: "Access to the company's AWS sandbox account."*

### 4. Constraints
#### 4.1 Time Constraint
*   The strict deadline for the POC. POCs should be heavily time-boxed.
    *   *Example: "This POC must be completed within 5 working days."*
#### 4.2 Technology Stack
*   The specific technologies, libraries, or frameworks that will be used.
    *   *Example: "Python 3.10, FastAPI, Docker."*

### 5. Results & Conclusion
*   **(To be filled out after the POC is complete)**
*   **Outcome:** Was the POC successful based on the success criteria defined in 1.2? (Yes/No).
*   **Key Findings:** A summary of what was learned. This includes quantitative results (e.g., "Average response time was 153ms") and qualitative insights (e.g., "The API's documentation was misleading regarding rate limits, requiring a workaround.").
*   **Recommendation:** What is the next step?
    *   *Example: "Proceed with this technology for the MVP."*
```markdown
````