SAP Teaching Material for the Department of Production Management

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Enter an estimate for the actual percentage of completion in the work breakdown structure or network. In addition, a measurement method for estimates and a maximum percentage of
completion can be specified in the Customizing for the Project System.
The maximum percentage of completion prevents an overestimate of completion which
occurs when tasks are "almost finished", also called the "90% syndrome". As long as the
task has not been completed, that is, no actual finish date has been entered, the system will not allow you to have an actual percentage of completion which is higher than the maximum percentage of completion.
Degree of processing
When this measurement technique is used, the degree of processing from the confirmation
becomes the percentage of completion.