0 Lag Time b/w 2 tasks

[Todduser]

Hi all,
I’m using Project 2K3 and need to tie 2 tasks (that use 2 different
resources) together with 0 lag time (Task2 needs to start immediately after
Task1 is complete). An example:
Task1: Wash Car – Resource: CarWasher
Task2: Rinse Car – Resource: CarRinser

The soap should be immediately rinsed.

I need to have Task2 start immediately after Task1, and if the CarRinser
resource is booked, Task1 is never started until Project can schedule Task2
to immediately follow Task1.

Thank you

 

[Jan De Messemaeker]

Hi,

The only way to force that for leveling is to make it ONE task with both
resoruces that you then contour. Then with the options leveling can split
and level assignments off, you keep the two together.

HTH


Jan De Messemaeker

 

[Todduser]

Thank you for your help with this. Do I make one resource front-loaded and
the other back-loaded? Or is there a better way?

 

[Steve House]

Links are permissive rather than obligatory. A normal FS link between your
tasks controls the earliest that rinsing can commence but it doesn't make it
mandatory that it start then - it could start later. In this context, I
like to think of 'predecessor' as meaning the controlling task while
'successor' means the controlled task. When viewed that way, the
predecessor does not necessarily always come before the successor. Since
you want the washing task to be controlled by the time that rinsing could
start, make the predecessor rinsing, the successor washing, and link the two
Start-To-Finish (the scheduled start of rinsing drives the scheduled end of
washing which in turn determines when washing should begin.) Link arrows do
not need to always go from top to bottom, so in your Gantt chart washing is
first, then rinsing. If washing was task 1, rinsing would be task 2.
Washing would have '2' in its predecessor column while rinsing would be
blank in its predecessor. The link arrow would flow upward from the start
of the rinsing task to the end of the washing task.

HTH

 

[Jan De Messemaeker]

Hi,

Yes there is.
Task Usage View
Simply type in the hours per day (or per hour if that is the minor
timescale)

 

[Jan De Messemaeker]

Hi,

The weakness of this approach is if washing for any sort of reason starts
late, rinsing will still be planned on the original date.Washing IS a
physical predecessor of rinsing and reverting the link is only an artificial
way to avoid Project's major weakness (the lack of a just in time
constraint) that does not reflect physical reality and hence is not a true
representation of the plan and may lead to nonsensical conclusions.

HTh

--
Jan De Messemaeker
Microsoft Project MVP
http://users.online.be/prom-ade

Links are permissive rather than obligatory. A normal FS link between
your tasks controls the earliest that rinsing can commence but it doesn't
make it mandatory that it start then - it could start later. In this
context, I like to think of 'predecessor' as meaning the controlling task
while 'successor' means the controlled task. When viewed that way, the
predecessor does not necessarily always come before the successor. Since
you want the washing task to be controlled by the time that rinsing could
start, make the predecessor rinsing, the successor washing, and link the
two Start-To-Finish (the scheduled start of rinsing drives the scheduled
end of washing which in turn determines when washing should begin.) Link
arrows do not need to always go from top to bottom, so in your Gantt chart
washing is first, then rinsing. If washing was task 1, rinsing would be
task 2. Washing would have '2' in its predecessor column while rinsing
would be blank in its predecessor. The link arrow would flow upward from
the start of the rinsing task to the end of the washing task.

HTH


--
Steve House [Project MVP]
MS Project Trainer & Consultant
Visit http://www.mvps.org/project/faqs.htm for the FAQs

Hi all,
Iâ?Tm using Project 2K3 and need to tie 2 tasks (that use 2 different
resources) together with 0 lag time (Task2 needs to start immediately
after
Task1 is complete). An example:
Task1: Wash Car â?" Resource: CarWasher
Task2: Rinse Car â?" Resource: CarRinser

The soap should be immediately rinsed.

I need to have Task2 start immediately after Task1, and if the CarRinser
resource is booked, Task1 is never started until Project can schedule
Task2
to immediately follow Task1.

Thank you

 

[Todduser]

Hi,
If I do that, the 2 resources are working simultanius on the task... and
that's not what I'm trying to accomplish on this. The contouring
(frontloading one and backloading the other) still has simultanious work
happening, just not as much as not setting a contour.
Thank you again for helping with this.
Todd

 

[Jan De Messemaeker]

If you put one resource the first day the oyther the second day they DO NOT
work together!

 

[Steve House]

Yep, very true. Actually any 'just in time' scheduling requires a
clairvoyance that we just don't possess. We could never know with any
certainty when Rinsing is going to start, all we can do is make an educated
guess and use that to determine the time Washing needs to begin. Suppose we
start washing and then, when we're half-way through the wash, the guy who is
responsible for rinsing calls in sick ? Could happen.
--
Steve House [Project MVP]
MS Project Trainer & Consultant
Visit http://www.mvps.org/project/faqs.htm for the FAQs

Hi,

The weakness of this approach is if washing for any sort of reason starts
late, rinsing will still be planned on the original date.Washing IS a
physical predecessor of rinsing and reverting the link is only an
artificial way to avoid Project's major weakness (the lack of a just in
time constraint) that does not reflect physical reality and hence is not a
true representation of the plan and may lead to nonsensical conclusions.

HTh

--
Jan De Messemaeker
Microsoft Project MVP
http://users.online.be/prom-ade

Links are permissive rather than obligatory. A normal FS link between
your tasks controls the earliest that rinsing can commence but it doesn't
make it mandatory that it start then - it could start later. In this
context, I like to think of 'predecessor' as meaning the controlling task
while 'successor' means the controlled task. When viewed that way, the
predecessor does not necessarily always come before the successor. Since
you want the washing task to be controlled by the time that rinsing could
start, make the predecessor rinsing, the successor washing, and link the
two Start-To-Finish (the scheduled start of rinsing drives the scheduled
end of washing which in turn determines when washing should begin.) Link
arrows do not need to always go from top to bottom, so in your Gantt
chart washing is first, then rinsing. If washing was task 1, rinsing
would be task 2. Washing would have '2' in its predecessor column while
rinsing would be blank in its predecessor. The link arrow would flow
upward from the start of the rinsing task to the end of the washing task.

HTH


--
Steve House [Project MVP]
MS Project Trainer & Consultant
Visit http://www.mvps.org/project/faqs.htm for the FAQs

Hi all,
Iâ?Tm using Project 2K3 and need to tie 2 tasks (that use 2 different
resources) together with 0 lag time (Task2 needs to start immediately
after
Task1 is complete). An example:
Task1: Wash Car â?" Resource: CarWasher
Task2: Rinse Car â?" Resource: CarRinser

The soap should be immediately rinsed.

I need to have Task2 start immediately after Task1, and if the CarRinser
resource is booked, Task1 is never started until Project can schedule
Task2
to immediately follow Task1.

Thank you