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Review Process Modeling, Process Improvement, and ERP Implementation
expense report
XOR connector

Expense report Expense report 193
approved rejected

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FIGURE 7-9 XOR connector in an EPC diagram

Figures 7-7 through 7-9 show one function connecting to two events using a branch
connector; however, it is not always the case that functions lead into the connector, nor
do multiple events always follow the connector. For example, Fitter could require that
salespeople complete expense reports at the end of a short sales trip, but at the end of
each week if a trip lasts more than one week. This condition is illustrated in Figure 7-10,
where the preparation of the expense report can be triggered by either of two events: the
end of the trip or the end of the week. It is also possible that more than two events could
trigger the function.

Trip Week
completed ends

Prepare
expense report

Source Line: Course Technology/Cengage Learning.

FIGURE 7-10 OR connector with two triggering events

Figure 7-11 shows all possible connection combinations. Note that it is not possible to
have a single event connect to multiple functions with OR or XOR connectors, because
events represent a status or state. When OR and XOR connectors lead to multiple

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