What is PERT and what does it stand for? What is the purpose of PERT? What are the key elements of PERT? What is a network diagram in PERT? What are activity duration estimates in PERT? How does PERT calculate the expected completion time of a project? What is the critical path in PERT? How is the critical path calculated in PERT? How can PERT be used to manage project risks? What are some advantages of using PERT in project management? What are some limitations of PERT in project management? What is the difference between PERT and CPM? How can PERT be used in agile project management? What are some common tools used to create network diagrams in PERT? What is the role of slack in PERT? How can PERT be used in resource allocation? How can PERT be used to improve project communication? What are some challenges in implementing PERT in project management? What are some best practices for using PERT in project management?