Final answer:
FD charts, often utilized in software development and engineering, are released based on project timelines and do not have a standardized schedule. Their frequency can vary from one project to another based on the chosen development methodology, such as agile or Waterfall.
Step-by-step explanation:
The FD charts, which likely refer to flow diagrams used in software development or other fields of engineering and business, do not have a standardized release schedule. Instead, their release depends on the specific project timelines, milestones, and the requirements of the team or organization that is creating them. For instance, in an agile software development environment, flow diagrams may be created or updated with each development sprint, which typically lasts 2-4 weeks. In a more traditional project management approach, such as the Waterfall model, flow diagrams might be prepared and released at the beginning of the project and then updated as necessary at each major phase.