Hello, I am a new customer needing to do exactly what you described in this post. Did you find a way to accomplish this? I need to set the Task Constraints to Fixed Dates so that I can enter the Planned Start and Planned End Dates. I set the Duration Type to Calculated Work so that I could assign one or more workers and define the % allocation for each to something less than 100% for each. When I first created the task, I assigned it to a team and was able to set the Planned Start and Planned End Dates. Once I assigned the task to workers within the team and assigned % allocation, the Planned Start and Planned End Date fields were hidden. It appears I can still change the Planned End Date but there is no way to get back to the Planned Start Date, which I might want to do if the task gets delayed and gets a new start date. Any thoughts you can share from your experience would be helpful.