I was using summary tasks to log some travel costs.


While my "normal" tasks are used for my human resources work during weekday, my summary task allow me to log travel cost that are also calculated during week-ends.
This would mean i would have to create hammock tasks to log these travel costs but it is a hassle to assign resources to hammock tasks as for some reasons it sometimes ignore the link indicated in begin and end to calculate lenght of the task bases upon resource usage (even if I put these tasks as "capacity" type)

As a suggestion, use Cost type resources for the travel costs. Their value is not counted in BCWP, BCWS, or ACWP. The values do count in BAC and EAC.