In the bundled HTML help (which launches when we press F1 in ProjeQtor,
this
page states that-
By default : Left = Assigned - Real
Left work should be re-estimated by the resource.
These are inconsistent statements, because the equation makes the Assigned and Real as independent variables and Left as dependent variable.
In that case the resource should not be able to change the Left variable.
To solve this issue, let us use a a third variable called "Extra work".
Then-
Left = Assigned - Real + extra work
The "extra" implies that this was not planned beforehand.
This has another advantage: If the resource is able to simply revise the Left figure, it is like moving the goalpost: The delay gets hidden.
But if the resource is asked to specify the specific amount of extra hours, it is held under limelight.
Also, while PM has to justify the Assigned hours, the resource has to justify the extra time he needs.
By default : Left = Assigned - Real
Left work should be re-estimated by the resource.
These are inconsistent statements, because the equation makes the Assigned and Real as independent variables and Left as dependent variable.
In that case the resource should not be able to change the Left variable.
To solve this issue, let us use a a third variable called "Extra work".
Then-
Left = Assigned - Real + extra work
The "extra" implies that this was not planned beforehand.
This has another advantage: If the resource is able to simply revise the Left figure, it is like moving the goalpost: The delay gets hidden.
But if the resource is asked to specify the specific amount of extra hours, it is held under limelight.
Also, while PM has to justify the Assigned hours, the resource has to justify the extra time he needs.