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In PSA, there was a mode to calculate Duration using each of the task's Efforts and number of Resource, and a Manual Mode to turn off the correlation of each and make it editable. In Project Operations, these three relationships are always in effect, making it difficult to respond to irregular tasks.
As with PSA, provide an option to turn off the Efforts, Duration, and Resource relationships.
STATUS DETAILS
Declined
Ideas Administrator

The direction of the user experience in Project Operations relies upon scheduling in Project for the Web.    Elements of manual mode can be accomplished based upon the specific scheduling mode of the project.   For example, if customers desire the ability to change duration without impact to effort, then Fixed Work would be the ideal scheduling mode to meet a customer's needs.