My degree might as well have "The University of Joshua Emmanuel" written on it. I pretty much learned my MBA concepts from you. You're better than most professors out there.
3:55 I think there's an error there when you said the project should start 36 weeks earlier, I think the project should start 3.7 weeks earlier than the initial planning to end on time with 90% probability, because what we have calculated is the total duration of the project (critical path) and it's 35.7w, while we had 32w as initial duration. so we should substract 35.7-32=3.7weeks. not about 36 weeks earlier. correct me if I'm wrong please
holly shit, you just saved my ass bro, my final's on monday & idk tf that even was when my prof explained it, and you did it in 4 minutes & I understood it all so easily. god bless you.
This is exactly what i am looking for! Great presentation! Keep making video to help others like me, who is trying to figure out what is missing on my book 🤣🤣🤣 youtube is really a great help to students! Thank you so much!
Yes. We always divide by 6 no matter the number of activities. The expected value is a weighted average. “a” has a weight of 1 “m” has a weight of 4 “b” has a weight of 1. Total weight = 1 + 4 + 1 = 6
sir i have one question, at 2:47 u got the value of P = 0,8508 from the table, how u get that value? and what the table is that? i don't understand, would u like to explain me please... thank you.
This is exactly what i am looking for! Great presentation! Keep making video to help others like me, who is trying to figure out what is missing on my book 🤣🤣🤣 youtube is really a great help to students! Thank you so much!
How would I go about calculating probability of completion time of, for example, exactly 37 weeks. Would I be able to answer less than or equal to 37 weeks and this would be sufficient? Or do I need to subtract probably of more than 36 weeks but less than 38 weeks?
@@joshemman Okay. Can we use this technique in also construction sector for activity and project estimations? Some people says it is not convenient because of %50 chance. Let say, still we choose this technique for application. What would be the good part to use PERT in that field? Thanks.
@@AkinveNazIrlanda PERT can be used in a construction setting, that's what I inferred from reading my textbook. PERT originated from the military with unknown duration of tasks to be completed in a research and development environment. PERT was designed for uncertainties. However, using historical data or logic to construct reasonable time estimates for task duration is a big plus. If you look at the stats in the video, 4 more weeks for +40% success rate...seems worth the wait.
Watched 4 of your videos, learned my whole semester
LMAO Same here
the guy is unbelievably efficient
Which 4
thanks alot It really helped me
i learned more from this 4min video than i did in my 2 hour class. thank you
Thank you sir, you just summarize my 2 hours course into 4 minutes.
Well done sir.
My degree might as well have "The University of Joshua Emmanuel" written on it. I pretty much learned my MBA concepts from you. You're better than most professors out there.
I wish i found you during my bachelors in engineering, I would have made a far confident engineer
best video ever, you solved all my doubts!! thank you so much btw im from Monterrey Mexico
Really very great. This video helped me a lot !!
Thanks..
How did you get 32 as the mean
3:55 I think there's an error there when you said the project should start 36 weeks earlier, I think the project should start 3.7 weeks earlier than the initial planning to end on time with 90% probability, because what we have calculated is the total duration of the project (critical path) and it's 35.7w, while we had 32w as initial duration. so we should substract 35.7-32=3.7weeks. not about 36 weeks earlier. correct me if I'm wrong please
Thank you so much. You are just like a god. explained so detailed.
holly shit, you just saved my ass bro, my final's on monday & idk tf that even was when my prof explained it, and you did it in 4 minutes & I understood it all so easily. god bless you.
This video is valuable even after 5 years. This video made me understand what my lecturer couldn't.
Glad to hear Ganee. Thanks for dropping a note.
Same to me❤
@@joshemman thanks for the videos ❤
Why (a+4m+b)/6?
Is the 6 is fixed or this can be changed?
The 6 is fixed.
It's a weighted average. The weights are
a: 1
m: 4
b: 1
Total: 6
@@joshemman Thanks a lot❤️
from where we get optimistic,most likely and pessimistic values?
this shows you that there are much more effective methods of teaching.
If there are multiple critical path, does that mean we need to find probability for each path?
Typically, you use the critical path with the largest variance.
This is exactly what i am looking for! Great presentation! Keep making video to help others like me, who is trying to figure out what is missing on my book 🤣🤣🤣 youtube is really a great help to students! Thank you so much!
Thanks to you, I passed my final exam. Thank you so much.
I have an exam tomorrow, I love you, thanks so much
same as me i love him so much he is my hero
You are great
Hello Joshua , Thanks for clear explanation . please which program are you using to present your videos ?
Astonishing ....could u teach us project crash
I stand AMAZED! Concise and presented professionally!! I want to work with you!!
Thanks for the comments, Tex. Want to work with me? I'm honored.
Sir, the areas now
Which graph are you using?
God Bless you Josh, you are indeed living for others. You are a Super Instructor..
Hi Joshua, Is there a reason why are we dividing by 6? It is always 6 no matter the number of activities?
Yes. We always divide by 6 no matter the number of activities.
The expected value is a weighted average.
“a” has a weight of 1
“m” has a weight of 4
“b” has a weight of 1.
Total weight = 1 + 4 + 1 = 6
Oh thank you very much. @@joshemman
I had this same question. Glad it was already answered :)
Thank you for making the video! Now I know what Scheduling of project is all about
sir i have one question, at 2:47 u got the value of P = 0,8508 from the table, how u get that value? and what the table is that? i don't understand, would u like to explain me please... thank you.
It is the Z-table (the standard normal table). You can find them online if you do a simple Google search.
big brain :) thank you!!
where do u ge or how do u get m(6)most likely and b(14)pessimistic
For academic purposes, they (a, m, b) will be provided for you. But practically, you know from records or experience on past projects.
Hello! @2:40, where do you get the value 35 weeks and 31 weeks? Thank you
As shown on screen μ = 32, and in
a) we want the probability P(X < 35)
Great video - very informative and easily digestible!
Thanks, Elliot. Nice to hear.
This was Perfect...
Superbbb content 😃😃😃
Thank you for clear and precise understanding on this topic
You're welcome, Sarib.
Hi, how do you get the z score of 90%?
in the table we need to check which value has .90 In table .8997 was close to .90 so we take z as 1.28
@@rahults1064 thank you
You save my job dude! Aahahah
Thanks for this... A whole semester in 4min
Happy to help!
Can you find the critical path if the only given is optimistic, most likely , and pessimistic?
You must know the predecessors as well.
thank you so much, sir!
If there are 2 critical path, which one should we use to calculate variance?
Can anyone please say how to a,m and b from the forward and backward diagram
a, m, and b must be given to you. You cannot find them from the nework diagram.
You are awsome, your PPT was great it was perfect.
Very nice video sir.
Short and sweet 😊😊
What is the probability that the project will need or take more than 31 days?
Thank you so much❤
Hello, what if we want a 99.99% probability of completing the project on time, when we should begin?
You can use your table or use =NORMSINV(0.9999) in Excel. This will return a Z score of approximately 3.72.
@@joshemman I'm confused sir, why dont we use the 3.69 and also the 3.70, 3.71, or either 3.73. They all have the same
@@kennethkayeramos2858 Are you using table or software?
@@joshemman table, sir.
Wa khasta monna 🫡
This is exactly what i am looking for! Great presentation! Keep making video to help others like me, who is trying to figure out what is missing on my book 🤣🤣🤣 youtube is really a great help to students! Thank you so much!
Thank You For this Amazing video...👍👍
How would I go about calculating probability of completion time of, for example, exactly 37 weeks. Would I be able to answer less than or equal to 37 weeks and this would be sufficient? Or do I need to subtract probably of more than 36 weeks but less than 38 weeks?
The probability of "exactly" should be zero because we're dealing with a continuous distribution.
Excellent!
How did you compute for the area???
It was obtained from the Z table.
Hey Joshua nice video, one question: what if the Time t is not an integer...? Round it up...?
Time does not have to be an integer. So only round if necessary or required.
There are different ways to calculating the variance. My book says variance = (t-a)/(b-t) / 7
How do we find the area for a certain value of z
See if this helps: ua-cam.com/video/p_KApjpyBHE/v-deo.html
test coming up April 10. THANK YOU SO VERY MUCH
lol transformed an hour's lecture into 10 minutes, hats off
How did you get the mean of 32?
By adding up the expected time for critical activities.
You are a lifesaver!
at 3:01 how did you find the .3632
www.math.arizona.edu/~rsims/ma464/standardnormaltable.pdf
what should i do if the expected time is NOT an integer? thanks
Nothing differently. It just makes calculations more challenging.
Super sir ,I understand clearly 👌👌
Really educative in such a short period of time thank you🙏🏽
Sir, I'm a Vietnamese student. Can you explain to me why there is 0.8508? 2:46
You can use the z-table (1.0 under 0.04) as shown in 2:46. Or you can use Google Sheets =NORM.S.DIST(1.04).
@@joshemman thank you. Appreciate your help ^_^
nice!👍
Have got an exam and this has really helped! Thank you!!
Hi Joshua, may i know what software you use to animate the chart?
I use PowerPoint for the charts but I edit and annotate using Camtasia Studio.
This dude is the best on UA-cam!!! Da General
This is a summary of an hour long lecture. Thank you so much!
Where can I find the z chart?
Just Google "Z table"
Helpful, thanks. Do you have a Google Sheet template to do this or can you recommend one?
You mean, to calculate the normal probabilities?
@@joshemman Thx for the reply. The whole thing actually. From the table for calculating variance to calculating those z scores
Excellent videos , thank you so much 🙏🏻
Why is the normal distribution used?
How did you find the mean of 32?
The mean is found by adding up the Expected Times for critical activities.
@@joshemman Thank you sir!
Importantly, if 36 weeks promises %90 chance success of the project, is that mean 32 weeks promise %80 chance of success?
32 is the mean. It promises 50% chance of success.
@@joshemman Okay. Can we use this technique in also construction sector for activity and project estimations? Some people says it is not convenient because of %50 chance. Let say, still we choose this technique for application. What would be the good part to use PERT in that field? Thanks.
@@AkinveNazIrlanda PERT can be used in a construction setting, that's what I inferred from reading my textbook. PERT originated from the military with unknown duration of tasks to be completed in a research and development environment. PERT was designed for uncertainties. However, using historical data or logic to construct reasonable time estimates for task duration is a big plus. If you look at the stats in the video, 4 more weeks for +40% success rate...seems worth the wait.
Great video. Thank you.
Hi, how did you get the values from optimistic to pessimistic? Thank you
Let's just say they are already given to you.
How can we get it from the given first value
Superb. Short and precise.
Great explanation! Thank you!
Thank you for making this!
Most uncertain activities is which one????
The one with the largest variance (or range).
Any utech student here?
why do you use standard deviation? when do you not use it?
SD is used to calculate the probability. The Z formula.
So helpful!
thank u for saving me !!!
You deserve a medal.
thanks like
Great Instruction!!!!!
I love you man. Thank You so much.
from Indian Institute of Management Amritsar.
Still lost
Where are you heading for exactly?
best explanation!
Is it always divided by 6 ?
Yes!
Thanks maan