Harvard Business Review (HBR) is a reputable source for business knowledge, including discussions on implementation methods. While there isn't a specific "Implementation Methods Matrix" associated directly with HBR, they often discuss frameworks and methodologies for implementing various strategies and initiatives.

One common approach to structuring implementation methods is through matrices or frameworks that align strategies with execution tactics. Here's a simplified example of how you might structure an "Implementation Methods Matrix":

| Strategy / Initiative | Implementation Methods |

|--------------------------|--------------------------------------------------|

| Market Expansion | - Joint ventures |

| | - Strategic partnerships |

| | - Direct sales force expansion |

| | - Online channel development |

| Product Innovation | - Agile development |

| | - Design thinking workshops |

| | - Cross-functional teams |

| | - Prototyping and iteration |

| Cost Reduction | - Lean Six Sigma |

| | - Process automation |

| | - Supply chain optimization |

| | - Outsourcing |

| Employee Development | - Training and workshops |

| | - Mentoring programs |

| | - Leadership development initiatives |

| | - Performance management systems |

In this matrix, each row represents a strategic objective or initiative, and each column represents a possible implementation method or tactic. This matrix can be tailored to fit the specific needs and context of your organization or project.

Remember, the effectiveness of implementation methods can vary based on factors such as organizational culture, industry, and current market conditions. It's essential to analyze these factors carefully when selecting and executing implementation methods.