Identify the true statement.

Identify the true statement.

A.
The Must Finish By constraint is used as the starting date for the backward pass.

B.
The Must Finish By constraint forces all activities In the project to finish by that date.

C.
The Must Finish By constraint affects the total Role limits for the project.

D.
All activities have negative total float without a Must finish By constraint assigned to the project.

Explanation:
Must Finish date is not constraining Activity. It is used to calculate the schedule on
“Backward pass” to show the float whether negative or positive. If Must finish date is less than
current project finish date then some critical activities will be showing negative float but if current
project finish date is less than must finish date then it will show all positive float.
Note:
The Must Finish By date can be thought of as a project level constraint. Once the last activity in
the schedule exceeds this date, negative float will appear.
This can be tricky because the Must Finish By date isn’t assigned to a specific activity. Instead, it’s
a project constraint, so check the Projects window’s Date tab in the details area and make sure
that the Must Finish By date is either not set to anything at all, or if utilized, is set to at least one
day past the calculated project finish date.
Of course, if the project really must finish by a certain date and this field has been set in Primavera
P6 accordingly, then normal schedule delay mitigation processes apply.
Note 2: Negative float appears when an activity that has Late dates that are earlier than the Early
dates. In other words, the critical path dates now exceed a hard constraint date on one or more of
the activities and are reporting this fact with the negative float calculation. If you see negative float,
something important is now scheduled after its delivery date.

Normally such activities are easy to find with a filter or two and a little column adding in the table.
However, there is one constraint that doesn’t appear in the network but can create all manner of
chaos if you don’t know it’s been set.
Example:

Note 2:
Primavera calculates the backward pass starting from the end date of the project finish date you
enter manually. Therefore, if the end date is not possible to be achieved using the network logic
that you have made, then you will always get negative total float.