1. ## Elapsed Duration (2000)

Hi,

I am just learning to use Project. I have entered a task duration to be an elapsed duration (for paint drying). It does not show as being a critical task, even though it has a task that directly follows it's completion which is critical. Also, if I extend the duration of the elapsed time it delays the completion of the project.

What is the logic behind elapsed tasks not being critical?

Thanks, Laurie

2. ## Re: Elapsed Duration (2000)

Laurie,

Welcome to the lounge.

Just because you input a task with an elapsed duration does not necessarily make it critical (it could be). The elapsed duration implies that the the duration is not restricted by the working time calendar or simpler, continuous time. So if you input a task as 5ed and the task spans a weekend, the task would take five days and continue over the weekend even if the project calendar states no work is to take place over the weekend. If the task was 5D, (not elapsed time) then the task would span over the weekend with no work being done and continue during the week; the total time being 7 days.

A critical task would be one that if its finish date were delayed would delay the project finish date.

You say that the task following the completion of the elapsed time task is critical so you want to know why the elapsed time task is not critical. Two things. Check the total float on the tasks. Those that are zero or negative are critical. Also, check the working days on your calendar. If you have a 24/7 calendar setup, that is, you can work 7 days per week and 24 hours per day, then setting a task as elapsed time is meaningless as all tasks will appear to work as elapsed time whether specified or not.

HTH

3. ## Re: Elapsed Duration (2000)

Hi Gary,

Thanks for this. Your advice to look at the total float was the solution. That told me that the 2 tasks did not immediately follow each other. Because the predecessor was an elapsed task, there was float that went through the night. I could only see it when I zoomed in closer to the Gantt Chart.

One other thing is that I do find that you have to keep zooming in and out on the Gantt chart because it is not visibly accurate. For example, my working day starts at 8.00am, yet on some zooms it looks as though it is 7.00am or 6.00am. It is only when I zoom in very close that it shows the correct time as 8.00am.

Is this normal?

Thanks again, Laurie

4. ## Re: Elapsed Duration (2000)

You said "Is this Normal?" regarding the gantt view.

I am not sure I am following what you are looking at as the Gantt view I use typically reviews data by months / days or some larger timescales. I don't see how you are looking at data at such detail in this view. <img src=/S/shrug.gif border=0 alt=shrug width=39 height=15>

Also know that your critical path in a project can also change based on progress of various predecessor / successor tasks.

5. ## Re: Elapsed Duration (2000)

That's a good point about the project length. It so happens that the project I am creating is relatively short, but usually projects would be longer.

Thanks, Laurie

6. ## Re: Elapsed Duration (2000)

Hi Laurie,

I found on a project plan I was working on that had a very short duration (24 hours) one of the defaults of Project is to round Gantt bars to whole days. You might look in Format - Details and remove the check mark from Round Gantt Bars to Whole days and see if you get a more accurate picture.

Carla

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