PERT and CPM are very similar in their approach but still present some differences. The PERT distribution has a smoother shape than the Triangular distribution. Use of CPM and PERT became more common as the computer revolution progressed. Nevertheless, the GERT approach addresses the majority of the limitations associated with PERT/CPM technique. Pert L. Kelton was born in 1907 in Great Falls, Montana. Because of this core difference, CPM and PERT are used in different contexts. He is the twin brother of chess International Master Richard Pert. In 1997, she starred in a popular commercial for Pert Plus. "PERT" was developed primarily to simplify the planning and scheduling of large and complex projects. DuPont's critical path method was invented at roughly the same time as PERT. PERT Chart was renamed Network Diagram and was greatly improved in this version. Amylase also has medical applications in the use of pancreatic enzyme replacement therapy (PERT). It is commonly used in conjunction with the program evaluation and review technique (PERT). A method that is commonly referred to as PERT is popularly used in STA. The PERT distribution is featured in most simulation software tools.