Dear Planners,
Can any one give me a real example for using LOE activity? I know how to use it but I do not know in which cases are used?
In updating schedule, shall I enter the progress to LOE activity or just progress of its predecessors and succesors and the software automatically will calculate the progress of LOE activity?
Best,
Moutaz
If no activity is linked and they use the start on or after constraint then they wil not be scheduled to start until the constraint date. Howver if the data date is past the constraint date then the start date will RIDE the data date.
Because I do not have P6 I would like to know what happens in my example if no activity is linked and are placed as shown on the diagram using start no earlier constraints.
As per Oracle:
https://docs.oracle.com/cd/E17266_01/English/P3_to_P6_Migration_Guide/P…
A hammock activity expands to "umbrella" the activities encompassed within it. A LOE activity acts like a "filler" activity—it compresses to fit between activities.
Note: To duplicate a hammock activity as a LOE activity in P6 EPPM, you should only assign one predecessor to the LOE activity and one successor activity from the LOE activity.
For many of us used to the hammock using other software this is weird behavior. We are used to have predecessor and successors that as the job progress move ahead or behind each other and you do not know when, a Hammock defined by two activities will not do it.
Thanks Zoltan
www.mosaicprojects.com.au/Mag_Articles/P016_Hammocks_LOE_and_Summary_Ac…
www.simplexgroup.com/level-of-effort-in-primavera-p6/
From last reference this is my interpretation of one of the differences between a P6 LOE and Hammocks as defined in other software. I do not use P6 but some of you can confirm what is LOE in P6 and how you model the LOE and Hammock activities with multiple predecessors and multiple successors.
If what the rerference says is correct then I do not understand the use for P6 LOE.
There is other site that adds confusion to what a P6 LOE activity is.
http://www.gcc-engr.com/blog/level-of-effort-activity-primavera-p6-step…;
A level of effort activity's duration is calculated from the earliest early start of its predecessors/successors (linked to the start end of the level of effort activity) to the latest early finish of its predecessors/successors (linked to the finish end of the level of effort activity).
A hammock activity’s duration is calculated from the earliest early start of its predecessors to the latest early finish of its successor activities.
Also take alook at the following Oracle Link:
https://docs.oracle.com/cd/E17266_01/English/P3_to_P6_Migration_Guide/P…
So just for curiosity in my example link FS A to C lag of 12 days and link FS B to D lag 5 days and create the LOE activity with the predecessors and successor for the LOE activity as defined in the example where each square represents a day, and let me know.
If this site is closer to what it is then LOE and Hammocks are not the same, Hammocks are more functional.
I use Spider Project and a Spider Hammock uses only predecessors, all predecessors link can be to the same activity and recognize lag in an intuitive way, therefore it can model traditional hammocks very easily and more.
As far as I recall hammocks in P3 and SureTrak are defined by predecessor and successor but work different to P6.
As far as I recall Microsoft Project Hammocks under certain circumstances can drive successors or be driven by external predecessors similar to the Topic Activity in SureTrak.
It would be interesting to compare LOE and Hammocks under the effect of Lag using different software. Their use of calendars can differ. How they deal with resource leveling might differ. How they deal with external predecessors and successors might differ. File conversions to/from another software might differ. The best ways to learn how they work is by having access to all compared software and investigate.
How come somthing as simple as a P6 summary activity type can create so much confussion? Confussion I have never seen before between users of other software.
correct they shoudl not be critical
these could be level of efforts over the life of the project
Think of them as this that do not have direct labor associated with them but still need to exist or are required to run the project
things were you are not measuring any type of work productivity but still need to be performed
these are support-type activities that have to be done to support other activities or the entire project. It usually consists of short amounts of work that must be repeated over and overagin and have no set time frames.
Thanks ZOltan for your explanation, but could you give me a break down for activities in PM exists over the life of the project.
As I know LOE activity should not be critical though the related activities are critical, is it right?
Best,
Moutaz
the activities that lead to the LOE Project mangaement or general conditions is the start of the project or NTP or project award. You wil have a LOE on the 1st day of the project and you will have general conditions in the first day of the project.
A Hammock activity DOES exist in P6 it is just not called a hammock in p6 but it has what EVERY HAMMOCK in any scheduling system has which is a predecessor with a start to start relationship and a successors with a finish to finish relationship.
The LOE activity does NOT have to have a ss predecessor or a ff successor. Its predecessor can be a FS and so can its successor.
Yes the Hammock and the LOE use the activity type named LOE but these are 2 different and distinct things.
I would use a LOE to represent just what it says some type of level of effort that must be performed over some activities and since it is a LOE (key word effort) I would have a resource associated with this activity and I would have the associated manhours and dollars.
If I just wanted to summarize a group of activites then I would use a Hammock (activity type LOE) but this activity would NOT have any assocaited manhours or dollars becasue the EFFORT (manhours and dollars) are already listed in the detailed activities that the hammock is summarizing. If I put manhours and dollars on the hammock then I could be double dipping the manhours and dollars.
Thanks Zoltan,
Can you provide me with activities lead to LOE Project mangaement or general conditions?
LOE activity also uses SS predecessor relationship and FF successor relationship as Hammock which does not exist anymore in P6.
Best,
Moutaz
lets say that you wanted to add an activity that exisited over the life of a project or an ongoing task that depend on other activities.
maybe temporary power, general conditions, clerical work, or project management you can use a LOE for those type of activities
since it is a LOE you do not progress a LOE it is automatically progressed based on its predecessors and successors.
this is different from a HAMMOCK which uses a start-to-start predecessor relationship and a finish-to-finish successor relationship