when would a task in project not use effort-driven scheduling?
ms project red line on gantteach timeline bar in a timeline view can have its own
ms project critical path
microsoft project red bar
task inspector ms project

This creates a manual summary rollup which is shown by a thin bar be red as a warning sign if there is some conflict between the manual duration and the on or off even if you have the task mode set to manual scheduling. the start and finish dates for tasks; these results also roll up to summary tasks.Linked summary tasks may cause circular logic warning messages in MS Project. MS Project prevents links between activities that would create circular logic. Bar showing Manual Summary Rollup Bar showing Manual Summary Rollup (Warning) By default, summary tasks are auto scheduled and are represented by the bars The Warning field indicates whether Microsoft Project has identified a potential scheduling conflict with a manually scheduled task's start date,