That sounds like a great focus area! Let’s start by exploring the foundational aspects of your methodology:

### Foundational Questions
1. **Core Principles**: What are the core principles you believe every software company should follow when implementing authentication and authorization?
2. **Common Pitfalls**: What are the most common mistakes or oversights you’ve seen companies make in this area?
3. **Security First**: How do you prioritize security without compromising user experience? Do you have a guiding philosophy or process for balancing these two?
4. **Industry Standards**: Which industry standards (e.g., OAuth, SAML, JWT) do you consider essential? How do you decide which ones to use or recommend to clients?

### Process-Oriented Questions
1. **Assessment**: When you first engage with a client, how do you assess their current authentication and authorization setup? What key factors do you evaluate?
2. **Implementation Steps**: What are the high-level steps you follow to implement a secure and scalable authentication system? Can these be broken down into phases or stages?
3. **Customization**: How do you tailor your approach to different types of companies, whether they are startups, mid-sized companies, or large enterprises?
4. **Tools and Technologies**: What specific tools, libraries, or technologies do you prefer for different stages of the process (e.g., identity management, access control, monitoring)?

### Methodology Differentiators
1. **Unique Approach**: What sets your methodology apart from others in the industry? Do you have a specific framework, technique, or tool that you’ve developed or refined?
2. **Client Collaboration**: How do you work with clients throughout the process? What strategies do you use to ensure that your solutions align with their business goals and technical needs?
3. **Adaptability**: How does your methodology adapt to the ever-changing landscape of security threats and compliance requirements?
4. **Education and Empowerment**: How do you educate and empower your clients to maintain and evolve their authentication and authorization systems after your engagement ends?

### Results and Outcomes
1. **Success Metrics**: How do you measure the success of your authentication and authorization implementations? What metrics or KPIs do you track?
2. **Case Studies**: Do you have any success stories or case studies that illustrate the impact of your methodology? What were the key challenges, solutions, and outcomes?
3. **Long-Term Maintenance**: What do you recommend for ongoing maintenance and security updates? How do you ensure that your clients stay protected over time?

These questions should help you start to form a comprehensive methodology that you can later refine and expand into your book and consulting work.