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WS-BPEL Extension for People (BPEL4People) introduces human activity to Web Services Business Process Execution Language (WSBPEL/ BPEL). Some works have been done on the performance verification of WS-BPEL, but there are not works on the performance verification of WSBPEL4People. In this paper, we propose a model method for the transformation of WS-BPEL4People / BPEL4People into Generalized Stochastic...