The key deliverables for the development & deployment of CMS Solutions projects typically include:

1. Project Planning:

1. • Detailed project plan outlining the scope, timeline, and milestones of the CMS development.

2. Requirements Specification:

1. • Clear documentation of functional and non-functional requirements based on stakeholder needs, including content creation, editing, and management features.

3. System Architecture:

1. • Design and documentation of the CMS architecture, outlining the components, databases, and the flow of information.

4. User Interface (UI) Design:

1. • Design mockups and prototypes for the user interface, ensuring a user-friendly and intuitive content management experience.

5. User Experience (UX) Design:

1. • Focus on creating a seamless and efficient experience for users interacting with the CMS.

6. Front-end Development:

1. • Implementation of the user interface design, including features for content creation, editing, and publishing.

7. Back-end Development:

1. • Development of the server-side logic, databases, and application functionality that power the CMS.

8. Database Design:

1. • Design and implementation of a database structure to store content, user data, and configuration settings securely.

9. Content Creation and Editing Tools:

1. • Implementation of features that allow users to create, edit, and format content easily, including support for multimedia elements.

10. User Authentication and Authorization:

1. • Implementation of secure user authentication and authorization mechanisms to control access to different CMS functionalities.

11. Workflow Management:

1. • Integration of workflow features, enabling users to collaborate on content creation and approval processes.

12. Version Control:

1. • Implementation of version control mechanisms for content, allowing users to track changes, revert to previous versions, and collaborate effectively.

13. Search Functionality:

1. • Integration of a robust search system to help users find and retrieve content efficiently.

14. Multilingual Support:

1. • Implementation of features that support the creation and management of content in multiple languages.

15. Media Management:

1. • Tools for organizing and managing images, videos, documents, and other media files within the CMS.

16. SEO Optimization:

1. • Implementation of features that facilitate search engine optimization, including metadata management and URL structure.

17. Responsive Design:

1. • Ensuring that the CMS interface is responsive and accessible across various devices, including desktops, tablets, and smartphones.

18. Security Features:

1. • Implementation of security measures to protect sensitive data, prevent unauthorized access, and secure the CMS against common cyber threats.

19. Documentation:

1. • Comprehensive documentation that includes user manuals, system architecture, and code documentation for future reference and maintenance.

20. Testing:

1. • Rigorous testing of the CMS to identify and fix bugs, ensure functionality, and enhance overall performance.

21. Deployment:

1. • Successful deployment of the CMS to a production environment, making it accessible to content creators and administrators.

22. Training:

1. • Training materials and sessions for administrators and content creators to effectively use and manage the CMS.

23. Maintenance and Support Plan:

1. • A plan for ongoing maintenance, support, and updates to ensure the continued smooth operation of the CMS.

Coming to an agreement on the abovementioned deliverables based on realistic timelines with adequate resources is in our opinion the best practice approach that contributes to the highest probability of successful development and deployment of a feature-rich and reliable Content Management System.