The improved algorithm of project cycle’s GERT model based on Standard Interval Grey Numbers

In order to estimate and control the project cycle of the new product research, the author introduces the interval grey numbers in grey system to the solution of the GERT network. Use the interval grey numbers to improve the network parameter flow, thus get the improved computation of the project cycle. Take overall design process of plane for example to carry on the research on the successful probability and deadline problem of the project, the result has shown its practicability and applicability in real project management.