A process model that makes use of several input and output criteria in the activities, but does not use gateways is denoted as being in activity form.
如果流程模型在活动中使用多个输入和输出条件，但并不使用网关，则表明它采用的是活动形式。
A second modeling error that we observed results from the reuse of the same activity within a process model.
我们观察到的第二种建模错误是由某一流程模型中对同一活动的重用造成的。
A phenomenon that we often observed in process models is the occurrence of dangling inputs and outputs, i.e., inputs and outputs of an activity or gateway that remain unconnected in the model.
流程模型中出现的一个常见现象是悬空输入和输出，即模型中保持未连接状态的活动或网关的输入和输出。
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