The development process for the Intelligent Tutoring System (ITS) model is multi-faceted and nuanced. The creation of an ITS typically involves following key steps:

1. Needs Analysis: Understanding the specific domain or subject area for which the will provide tutoring. This involves identifying the learning objectives, the target audience, and the specific knowledge or skills to be taught.

2. Content Analysis: Analyzing the content to be covered and identifying the key concepts, learning materials, and potential challenges learners might face.

3. Instructional Design: Designing the instructional strategies, learning activities, and assessment methods that will be used within the ITS to achieve the learning objectives. This may involve developing personalized learning paths for individual learners.

4. Knowledge Engineering: Identifying and formalizing the domain knowledge that ITS will use to provide instruction and guidance to learners. This can involve creating models, ontologies, or other representations of the domain knowledge.

5. Software Development: Building the software infrastructure for the, including the user interface, knowledge representation and reasoning components, and adaptive learning algorithms.

6. Evaluation and Iteration: Testing the ITS with real users, collecting feedback, and refining the system based on the evaluation results to improve its effectiveness and usability.

These steps involve collaboration between subject matter experts, instructional designers, software developers, and educational researchers to create an ITS effectively supports learning in the targeted domain.

This explanation provides a high-level overview of the ITS model development process, and the specifics can vary based on the context and goals of the particular ITS being developed.

Differentiating between national and regional architecture for an Intelligent Tutoring System (ITS) involves considering the scope, scale, and specific elements each encompasses.

National Architecture:

• Scale: Supports the entire nation or a large geographic area.
• Elements: Includes centralized databases, standardized content and assessments, nationwide user access, and coordination with national educational policies and standards.
• Considerations: with national curriculum frameworks, scalability to serve a large number of students, and alignment with national educational goalsRegional Architecture:
• Scale: Supports a specific region or locality within a nation.
• Elements: Encompasses localized content, regional educational policies, regional user access, and coordination with local educational authorities.
• Considerations: Customization address regional educational needs, integration with local curriculum frameworks, and alignment with regional educational goals.

Flow Chart of Generic ITS: Creating a flow chart of a generic ITS architecture involves representing the key components and their interactions. Although I can't draw diagrams directly, I can outline the elements to be included in the flow chart of a generic ITS architecture:

1. User Interface: This component encompasses the interface through which learners interact with the system.
2. User Profile Management: This involves managing user profiles, preferences, and data to personalize the learning experience.
3. Content Management: Includes the storage and organization of learning materials, courses and assessments.
4. Learning Management: Involves the adaptive sequencing of learning activities, progress tracking, and feedback provision.
5. Domain Knowledge Representation: the structured domain knowledge used by the system to provide instruction and guidance.
6. Recommendation Engine: Provides personalized recommendations learning resources and activities based on user data and performance.
7. Assessment and Feedback: Manages the assessment of user knowledge and, providing feedback and progress tracking.
8. Data Analytics: Analyzes user data to derive insights for system improvement and learning paths.
9. Administrative Tools: Supports system administration, content updates, and user management.
10. Integration with External Systems: Includes connections external educational systems, databases, and standards.

The flow chart visualizes how these components interact within the architecture and can vary based the specific requirements and design of the ITS.