Dates planifiées largement postérieures aux dates validées

Hello,
The allocation rates of the different resources were initialy based on the ratio [planned work / working days during the global period of the project]. The allocation rates were therefore fairly low.
In my example, the work of one resource was planned so that it could only work 0,4 a day and one day a week because of its very weak allocation rate. That's why the final date was planned so far in the future. In this particular case, an additional working day cause the final date to be planned a week later approximately.

Thank you for having pointed the affectation of the resource to the project. I could not access this information three days ago because I had only a "crew member" profile in the project. This has been freshly modified.
Best wishes for the new year.