Activity Diagram is a visual representation of workflows and processes, illustrating the sequence of activities and decisions involved in a system or project. This skill encompasses the ability to create diagrams that depict the flow of control and data, enabling clear communication of complex processes. Activity Diagrams are used to analyze, design, and document processes, facilitating understanding among stakeholders and aiding in the identification of potential improvements or efficiencies.

Business Requirements Documentation involves gathering, analyzing and documenting critical information about a project or product, including functional and non-functional requirements, constraints, assumptions and stakeholders' expectations. It requires a specialized skill set that includes technical writing, project management, communication, and collaboration with various stakeholders to develop comprehensive and clear documentation that serves as a guide for the software development team. The end goal is to ensure that the project meets the business objectives and that there is a shared understanding among all stakeholders.

Functional Requirement refers to a specification of the behavior and capabilities of a system or product, detailing what it must accomplish to meet user needs. This skill involves the identification, documentation, and analysis of requirements that guide the development process and ensure alignment with stakeholder expectations. Knowledge of Functional Requirement is used to create clear and measurable criteria for system functionality, facilitating effective communication among project teams and stakeholders throughout the project lifecycle.

Requirements Elicitation refers to the process of gathering and defining the needs and expectations of stakeholders for a project or system. This skill involves various techniques such as interviews, surveys, and workshops to extract detailed information that informs project scope and objectives. Knowledge of Requirements Elicitation is used to ensure that the final deliverables align with stakeholder requirements, thereby enhancing project success and stakeholder satisfaction.

User Guide refers to a comprehensive document designed to assist users in understanding and utilizing a product or service effectively. This skill involves the creation and organization of clear, instructional content that outlines features, functionalities, and troubleshooting tips. User guides are employed to enhance user experience, facilitate product engagement, and provide support for common questions or issues. The skill ensures that information is presented in a structured format that is accessible and easy to follow.