Evaluate Porter’s model for completeness and relevance. Is there anything that should be added to the model or removed from the model for you to conduct a comprehensive external analysis?

Evaluate Porter’s model for completeness and relevance. Is there anything that should be added to the model or removed from the model for you to conduct a comprehensive external analysis?
You have decided that Porter’s five forces model should guide your external assessment activities. Your initial challenge is convincing your colleagues that Porter’s model is a relevant starting point for external assessment and strategy development.

You are going to create an initial discussion post that addresses the question, why is Porter’s model an appropriate choice or why do you think Porter’s model is not an appropriate choice for external assessment activities?