Two project activities ‘A’ and ‘B’ (B being dependent on A) have a finish-finish relationship with 8 days ‘lag’. The estimated duration for the activities are 10 days and 15 days, respectively. If activity ‘A’ is scheduled to start on the 12th day from the beginning of project, on which day can you schedule to start activity ‘B’?
15th day I think. Lets consider if there was no lag then the activity A starts on 12th day and finishes 10 days after which will be end of day 21.Activity B will then start on 7th day and will finish 15 days after which is 21st day. Now apply a lag of 8 days to activity B which means Activity B can't be finished until 8 days after activity A has been completed. So, activity B will start on 15th day and will finish on 29 th day.
So I have a problem given to me from class that has a -2 SF Lag time. For example, Task G is dependent on task C and F(SF-2). Does this mean that task G can start 2 days before task F is completed? Do you have any examples of negative lags?
Assuming that you meant to write "task F" rather than "task C," so assuming that's the case, task G can finish 2 days after task F starts. It's a weird and probably unrealistic example.
Yeah, it's a weird one, not overly applicable in real life. I'd just accept that it's possible to find in a test, know what to do with it, and move on.
In construction I can't think of a realistic example either, but what if B doesn't necessarily have a duration it just knows that it has to start first then end 3 days after A begins. A PDM for Marketing /advertising maybe? Something else in that industry might signal A to start. That's the best I can figure, if I get smarter, I'll revise this.
Thank you... informative and straightforward... you made it simple... all the best
Wow Watchin these series non stop. Love it. Please make more Project Management Videos
Thanks
I was struggling to understand this in my lecture notes but you made it crystal clear sir. Very much appreciated
Very clear and concise explanation. Thank you so much Engineer4Free for posting these.
thanks man, you just saved my life
Glad to hear it bro. Do check out the rest of the PM videos that I made: engineer4free.com/project-management if you haven't already. Cheers
Two project activities ‘A’ and ‘B’ (B being dependent on A) have a finish-finish relationship with 8 days ‘lag’. The estimated duration for the activities are 10 days and 15 days, respectively. If activity ‘A’ is scheduled to start on the 12th day from the beginning of project, on which day can you schedule to start activity ‘B’?
15th day I think.
Lets consider if there was no lag then the activity A starts on 12th day and finishes 10 days after which will be end of day 21.Activity B will then start on 7th day and will finish 15 days after which is 21st day.
Now apply a lag of 8 days to activity B which means Activity B can't be finished until 8 days after activity A has been completed.
So, activity B will start on 15th day and will finish on 29 th day.
Subscribed. Your videos saved my life
Glad I was able to help :)
Really appreciate these videos, thank you.
Awesome, thanks for taking the time to let me know =)
you the best man , thanks a lot
So I have a problem given to me from class that has a -2 SF Lag time. For example, Task G is dependent on task C and F(SF-2). Does this mean that task G can start 2 days before task F is completed?
Do you have any examples of negative lags?
Assuming that you meant to write "task F" rather than "task C," so assuming that's the case, task G can finish 2 days after task F starts. It's a weird and probably unrealistic example.
thank you very much
You are welcome! There's more here: ruclips.net/p/PLOAuB8dR35oeyKU0ojIxD8Muf6Mwc8ugW 🙂
Hi Sir, Which tools do you use to teach and record.?
start to finish is not understandable
Yeah, it's a weird one, not overly applicable in real life. I'd just accept that it's possible to find in a test, know what to do with it, and move on.
In construction I can't think of a realistic example either, but what if B doesn't necessarily have a duration it just knows that it has to start first then end 3 days after A begins. A PDM for Marketing /advertising maybe? Something else in that industry might signal A to start. That's the best I can figure, if I get smarter, I'll revise this.
❤