In this paper, we propose architecture to simulate wafer probe. We use a modeling tool named CTPN (colored-timed Petri nets) to model all testing flow. With CTPN model, we can predict the delivery date of any specific product under some scheduling policies efficiently and precisely. In the scheduling phase, we combine two popular methods to contract high-quality schedules. One is to select machines for lots and the other is to select lots for machines. In each method, we use the GA-based approach to search for the optimal combination of a number of heuristic rules. This CTPN-based GA scheduler and helps us to find the good solution so as to meet the requirements in the complicated environment.

We propose a modeling tool named QCPN (queueing colored Petri net). The main idea of this tool is to combine the original CTPN (colored timed Petri net) with the queueing systems. With the QCPN model, we can predict the delivery date of any specific product under some scheduling policies efficiently and rather precisely. In the scheduling phase, we use the GA based approach to search for the optimal combination of a number of heuristic rules. This QCPN based GA scheduler can greatly reduce the computation time so as to meet the need for a rapidly changing environment.