About Lag Time

[Jac]

To whom it may concern,

I'm a user of MS Project 2003, I'm trying to enter a lag time into 1 of my
project's 3-day-task (10/7/06 - 10/9/06); which by default the start time was
8:00am and the finish time was 5:00pm based on the Standard Calendar & it
was applied throughout the duration. But after I entered the lag time of 40%
into that mentioned task, the start time changed to 9:36am & the finish time
of that task was 9:36am as well throughout the duration with the start date
on 10/7/06 - 10/10/06!

Initially, I thought that MS Project would calculate the inserted lag time
by multiplying the first 4 working hours (8:00am - 12:00noon) with 40% &
added the product to 8:00am in oder to get the start time of 9:36am. So, I
tried again with 50% of lag time, but now the start time changed to 1:00pm &
the finish time is 12:00am. I'm wondering how actually the lag time is being
calculated after it was inserted? Please advise......

Thanking in advanced.

 

[Rod Gill]

I assume you mean Lag for a link? If so, then your 40% should be 40% of the
duration of the task's predecessor. Your delay of 1:36 suggests the duration
of the preceding task is 4h?

What happens with 50% lag confuses me, because to have a finish time of
12:00am you need working time all night, or did you mean 12:00 (midday)?

 

[Jac]

Hi, Rod Gill

Thanks for answering.
Anyway, at the very beginning, I had a task with 3 days duration which was
from 10/7/06 - 10/9/06 & the start time was 8:00am (1st day) and the finish
time was 5:00pm (3rd day). This is the default.

After that, I entered a lag time of 40% into that mentioned task. The date
changed to 10/7/06 - 10/10/06 with start time on 9:36am (1st day) & finish
time on 9:36am (4th day).

Then, I deleted the lag time & re-entered as 50% (instead of 40% in the same
task). By now, the start time for 1st day changed to 1:00pm & the finish time
on last day is 12:00am.

These were all done in Gantt Chart view with entry table.
So, what would I like to know is how actually the lag time is being
calculated after it was inserted?
& is it still based on the 8 hours & 5 days working schedule?

 

[Jan De Messemaeker]

Hi,

Just to clarify a bit.
One can NOT enter a lag time "into a task"
A lag time is a delay in the link from the predecessor.
If it is a percentage, the percentage is taken from the predecessor's
duration.
Hope this helps

 

[Jac]

Hi,

ok, sorry for the conceptual error!
If originally, the task had the predecessor of 16; in order to add in the
40% lag time; then it would become 16FS+40%, right?

so, what should be the start time after added in the 40% lag time?

 

[Jac]

Hi,

I think I got the way how the lag time is being calculated already.

Thanks all for the help! : )