The correct answer is D. PERT is an analytic in concept, limited of event oriented diagrams, and used for research and development projects.
PERT stands for Program Evaluation and Review Technique. It is a method for planning and managing complex projects. PERT was developed by the United States Navy in the 1950s for the Polaris missile program. It is a network-based technique that uses a series of events and activities to represent the project. The events are the milestones that must be reached in order to complete the project, and the activities are the tasks that must be completed in order to reach the events.
PERT is an analytic technique because it uses a mathematical model to estimate the time and cost of the project. The model takes into account the probability of each activity being completed on time and the cost of each activity. This information is used to create a schedule and budget for the project.
PERT is limited to event-oriented diagrams because it only considers the events and activities that must be completed in order to finish the project. It does not consider the resources that are needed to complete the project. This can be a limitation for projects that have a lot of resources or that are very complex.
PERT is used for research and development projects because it is a flexible and adaptable technique. It can be used to plan and manage projects of any size or complexity. PERT is also a good technique for projects that have a lot of uncertainty because it allows for the possibility of delays and changes.
In conclusion, PERT is an analytic technique that uses a network-based model to estimate the time and cost of a project. It is limited to event-oriented diagrams, but it is a flexible and adaptable technique that can be used for research and development projects.