How to implement a 2-man-rule [editor]

In some situations, a task may not be performed by someone who has performed another task. This is often referred to with the term 2-man-rule.

More accurate would be to call this an exclusion rule, because the idea behind the rule is to exclude users for a specific task. The result of the exclusion of a specific user for a certain task is that another user has to perform that task, hence the term 2-man-rule.

In this article, the implementation of a 2-man-rule is discussed, based on the following simple process model:

The process shown above consists of four ad hoc tasks, AddFiles, ContactCustomer, MakeAssessment and UpdatePersonalInformation. These tasks are not specified further in this example, but the reader may very well understand what the contents of such tasks could be. The process has one mandatory task, ReviewAndClose. This task may not be performed by the user(s) who has or have performed any of the the tasks AddFiles, ContactCustomer, MakeAssessment and UpdatePersonalInformation.

Step-by-step guide