Continuous Integration and Continuous Delivery (CI/CD) aim to accelerate software delivery while maintaining high quality through frequent automated testing and deployment. This practice is endorsed by CompTIA Project+ as part of modern project methodologies for improving efficiency and quality.

A gantt chart is a visual representation of a project timeline that shows the tasks, durations, dependencies, and resources of a project in a horizontal bar chart format. A gantt chart can help a project manager to plan, monitor, and control the project progress, scope, and quality. A gantt chart is different from a milestone chart, which only shows the key events or deliverables of a project without the details of the tasks. A gantt chart is also different from a PERT chart, which is a network diagram that shows the logical relationships and sequence of tasks in a project. A gantt chart is also different from a WBS, which is a hierarchical breakdown of the project scope into smaller and manageable components. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 6: Schedule Management1; CompTIA Project+ Certification Study Guide, 3rd Edition, Chapter 6: Schedule Management2; What Is a Gantt Chart? 7 Examples for Project Management3; 3 types of visual project management: Timelines, calendars, and boards (with examples)4

Closing contracts involves finalizing any remaining contractual obligations and formally closing out the relationship with the vendor. CompTIA Project+ emphasizes this as part of the project closure phase to ensure all legal and financial aspects are complete.

A business collaboration tool is a software that enables teams to communicate, share, and create together online. A business collaboration tool can help project teams across multiple time zones to overcome the challenges of distance, time differences, and cultural diversity. A business collaboration tool can provide features such as instant messaging, video conferencing, file sharing, document editing, project management, and more. A business collaboration tool can also integrate with other applications and platforms that the project team uses. A business collaboration tool can improve the efficiency, productivity, and quality of the project team's work12. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 4: Project Communications, p. 137; The 15 best collaboration tools for productive teams - Workable; 17 Best Business Collaboration Tools for Teams - Venngage

Scrum is an agile methodology well-suited for projects that require frequent milestone deliveries and functionality demonstrations. It emphasizes iterative development, with regular presentations to stakeholders, which aligns with CompTIA Project+ principles for agile project management.