Determine Total Float & Free Float (AKA "Slack") of activities in a network diagram

[@antonvz19]

Attending a very expensive PM course, but hardly any one of the lecturers can compare to your simplistic way of teaching. Thank you very much!!

[@Engineer4Free]

Thanks for the feedback, means a lot. Plz share my vids with some peers if it might help them out!

[@vallekinloch7421]

aja.. you fell for the course as well, haha.. me too. Did the course.. wasn't what I expected.. but it at least offered a good study guide.. anyways, this video rocks :)

[@thereisnospoon9059]

Missed my lecture, could spend 1h going through lecture notes or watch your 7:13 video, thanks for saving me time it was very concise and well explained.

[@Engineer4Free]

+There is no spoon (Ze Engineer) Thanks for the compliment! You can find the rest of the PM tutorials I made here: www.engineer4free.com/project-management good luck in your class!

[@zaradavidsonnotasinglestor3874]

8 years later, still very much useful. Thank you.

[@tripletalcantara6531]

RECOMMENDED THIS TO MY LECTURER AND HE WAS SHOOK!!!!!! CONGRATS FOR THIS.

[@Engineer4Free]

hahaha, you should send them the full course: engineer4free.com/project-management 😜

[@jayschroniclesinc7827]

I wrote nothing on my Continuous Assessment Test today since I missed the class and had no notes..... But as we talk am now a master in Network Diagram even in dreams I can work it out without a Fail... Thanks ... In our local dialect we say Thengió Munó

[@bonyimakaveli633]

I knew I would find a Kenyan here💪🏿

[@Nice_nightmare]

Thank you so much! im taking project management as an online course and besides the book, nothing else can explain this to me. This along with the other videos were extremely clear, easy to follow, and all around helpful for me to understand. I have to do this kind of problem for my final and i was sure i was going to fail until I watched these videos!

[@byaruice1]

in times of an urgent assignent due in 2 days, yo ur video saved me 3hours of repeating a lecture. god bless you.

[@prathamIsOp]

Thank you so much sir, i spent 2 hours trying to figure out how to find out Free Float and Total float , i was many YT videos but none of them were explaining using this BOX Diagram method...Finally found your lectore...tysm, you are a life saver

[@asaamhussein4913]

i attend uni for my MSc in PM and I swear to God sometimes I feel lost and don't know what they're talking about- I luckily found this channel and its easy to understand thank you so MUCH I shared it with my friends :D

[@mariethsiku1076]

I was having trouble with my assignment, but after watching the videos I understand it so much better. Thank you so much. YOU ARE AWESOME!

[@Engineer4Free]

Thanks for letting me know! Glad I can help 🙂

[@ReinierRuneScape]

Jesus christ finally a good tutorial. I liked how you actually did subtract ES and duration instead of just substracting EF.

[@Engineer4Free]

Thanks! Might as well do it correctly :) Make sure you check out the rest of my PM videos at engineer4free.com/project-management if you haven't already. Cheers!

[@srilankamoscow]

astoundingly simple!! and Clarity of different level!!! Hats offf!!

[@Engineer4Free]

Thanks sramkumar!! =)

[@gtravelpathways]

Thanks for exampling free float. My textbooks did a horrible job.

[@Engineer4Free]

Glad it helped! =)

[@kamaleshvasudeva1396]

You are my online Guru for network diagram.Thanks a lot for very simple explanations.

[@tpc8277]

Wow. Thank you soooo much. I was having a hard time understanding and calculating floats while studying for my CAPM exam. Now I can confidently say that I'm ready for any schedule questions!

[@Andualemberhanu1988]

I was having trouble with this course, but after watching the videos I understand it so much better. Thank you so much. YOU ARE AWESOME!🙏🙏🙏

[@andaroomca]

helped a lot, much more clear and easier to understand than what my uni taught me, thanks!

[@Engineer4Free]

Glad it helped! Thanks for commenting!

[@tebogoprince6077]

i ddnt understand these things in class but now am familiar with them. thank u very much sir!

[@Engineer4Free]

I'm really happy that I can help you out, make sure you check out all my free PM videos at engineer4free.com/project-management if you haven't already :)

[@brownieb661]

Thank you very much for your videos. I went through all the videos that I could find about this topic and presented by you. I have a firm understanding on this topic now. Again, thanks.

[@Engineer4Free]

Awesome thanks for letting me know, I'm really glad to hear it :)

[@savy6969]

Thank you so much! youre knowlege and video helped me alot to prepare for my upcoming exams. May God Bless you Sir. ❤

[@nagihanakdeniz6888]

I couldn’t understand this topic in school. But after watched your videos I understood perfectly. Thanks a lot..:)

[@Engineer4Free]

Awesome glad to hear that I can help you out =) =)

[@haribabujikh]

Awesome explanation. Nobody else have explained this better. It helps a lot. Thanks a ton..

[@asadullah1336]

Thank you for your informational video, it helped me in my test as i had missed the class of network diagram in my university.

[@Engineer4Free]

Glad I was able to help! If you haven't already, do check out the rest of my PM videos at engineer4free.com/project-management

[@aphelelemakade9569]

You Have Helped Me understand Network Diagram❤. Thank You Very Much And God Bless You 🙏

[@norm5796]

Thank you so much !!! It helps at 2am.

[@spearmethrough]

clear and concise, better than my lecturer, thank you

[@Engineer4Free]

Thanks for the comment! =) =)

[@jenniferokeke4186]

Really really grateful... I completed my project plan with this lecture.

[@rushabhbansode7056]

It really helped a lot, A big thank you!

[@Engineer4Free]

Great, thanks for letting me know!

[@saniisahabba4023]

Thanks very much for this explanation i got it really especially the FF calculation

[@maksympt1]

Thanks man! I have a midterm in 2 days and my teacher couldn't explain it like you did in this video.

[@BasEniac]

Thanks to you I passed my complement exam

[@Engineer4Free]

[@juhip1]

excellent video - some videos assume the ES of 1st activity as 1 and keep subtracting 1 from every successor activities ES , you have assumed 0 and are not subs 1 in forward pass . What is the correct method?

[@Engineer4Free]

Neither method is truly more "correct" than the other, they follow the same logic, but are just shifted from each other by one. If you are in school or studying for a certification, then just follow the method that your instructor is using. The reason that I start with zero stems from the way I label and draw my Gantt charts, you can see in this video: kzbin.info/www/bejne/hJSynn2Jp72MpbM where the column "0-1" represents day one, so therefore 0 represents the start of day one, and 1 represents the end of day one, but also the start of day two. And so on... Hope that helps, thanks for the question!

[@leonfreezy8557]

Thanks for making it so concise and easy.

[@Engineer4Free]

Great! Have you checked out the rest of the videos too? engineer4free.com/project-management 👌

[@leonfreezy8557]

@@Engineer4Free I watched 50 percent of your playlist. Wonderful job. I Have a test coming up. Just revising things😆

[@saikrishpotlapalli5732]

can you please make a video on the independent and interfering float. Thank you

[@nasrudeenmuhyideen3754]

This is fantastic, I find this helpful. Thanks

[@Engineer4Free]

Glad to hear it!!! =)

[@chuajingyu4324]

Great explanation, and it helps me prepare for my test tomorrow!!! Thumbs up!!!!

[@hajiomer8236]

Cordially appreciate and thanks to Ian Hayes for making the calculation simple

[@ianhayes9101]

You make the computation of free float a bit more complicated than it has to be. Instead of subtracting ES and duration, just subtract EF.

[@AnotherStudent96]

I tried, it might make a mistake , look at the F and E activity in the video

[@mohammedal-mashehdi1271]

@@AnotherStudent96 no mistakes FF activity = ES successor - EF activity

[@deep77thakkar]

Mohammed Al-Mashehdi Can you help for the formulae of independent float?

[@fatimajahangir9073]

@@mohammedal-mashehdi1271 Thanks a lot

[@suzanpathan1603]

@@deep77thakkar whats the formula for independent float?

[@jacqueshollands5630]

Excellent explanation. This really helped me.

[@entlekutlapye5343]

Thank you so much. I have passed because of you❤

[@Engineer4Free]

That's amazing!! So glad to hear it ♥️

[@loupis1]

Perfect narration. Wish you taught at my school.

[@Engineer4Free]

+loupis1 Thanks for the compliment! You can find the rest of my PM tutorials here: www.engineer4free.com/project-management :)

[@SystemsProjectEngineer]

Excellent demonstration.

[@Engineer4Free]

Thanks!!! =)

[@mohammadkhashashneh7506]

best KZbin channel keep it up, 👍,u helped me alot

[@MrRickykissel]

Thanks man! Im prepping for the civil PE and this is great stuff!

[@Engineer4Free]

Hey you're welcome Richard! Glad you're finding my videos helpful for the PE, hope it goes well! =)

[@manologodino941]

Thank you very much for this very clear explanation!! One small question, what happen when you have Start to start or finish to finish linked tasks (even including lead/lag), how to calculate the free float? Using the expression on the video obviously fall into negative values which makes no sense as per the concept of float, but I guess in that case the calculation expression mustchange right?

[@srahimi3174]

Explained really well -- Thank you

[@dzidzaimangombe]

Well explained, thank you for this

[@Engineer4Free]

You are welcome! =)

[@user679jk7]

What a fantastic explanation! Thank you so much!

[@ace_cubes]

Great job on explaining the difference between TF and FF

[@Engineer4Free]

Thanks!!! =)

[@vanlillbonnie5750]

why successor's ES is on the same date of predecessor's EF? Should ES date of successor add one day more from EF of predecessor’s? You must wait for previous activity to finish and start ES on next activity. It doesn’t mean scenes when you put them on the same date.

[@Engineer4Free]

It comes from how the giant chart is drawn. Watch this video first: www.engineer4free.com/4/how-to-draw-a-gantt-chart You can see that 0 represents the beginning of the first day, 1 represents the end of the first day AND the beginning of the second day. 2 represents the end of the second day AND the beginning of the third day. 3 represents the end of the third day AND the beginning of the fourth day. And so on. So in that video, Activity A has a duration of two, so it starts at the beginning of the first day (0) and ends at the end of the second day (2), and Activity B then starts on the beginning of the third day, which is also marked by 2. On the network diagram, these come across as the activity’s Early Starts. Hope that helps clarify it for you!

[@siyabkhan7873]

thanks wallah really appreciate it you explain it in very simple way

[@bulaschannel2892]

thanks a lot for sharing. only idiots cant understand. you are a good teacher. I`m having my exams tomorrow. im ready now

[@Engineer4Free]

Hope the exam went well!

[@lwazigambushe3402]

Thank you this was very useful 🙏

[@Engineer4Free]

You’re welcome!!! 🙂

[@maheshbathala7951]

Wow, wonder, we can save the time lot, good and perfect explanation

[@Engineer4Free]

Glad you liked it

[@pratikvaghasiya1488]

best concept taught in easy way thanks

[@muslimgirl7716]

Thannnnnkkkkkkkssss 🌸🌸🌸🌸🥺❤❤❤❤ u help me so much in my exam thanksss❤❤❤

[@Engineer4Free]

Most welcome 😊

[@britney1395]

Thank you. I'm studying online during quarantine and my teacher just gives us assignments to do and tell us to study online. 😭😔

[@Engineer4Free]

Ooof, well I got Ur back. See all my PM videos at engineer4free.com/project-management please share with your class if you can! 😊😊

[@caveshlin]

Great vid! Quick question. If I have three activities with no predecessors, how do I construct the network? Will it have a 'start' node that bursts into the three activities? Or will I just have three separate activities starting points?

[@Engineer4Free]

For an Acticity on Node diagram like this one, you will not have a single start node that bursts into three. You will have three seperate initial nodes, all with ES=0. Organize them all on the left hand side, one over the other, and then use the logic from the table of dependencies to draw out their successors. When you do the forward pass, set all three initial activities' ES to zero, and count up as usual. When you do the backward pass, at least one MUST have a LS = 0 . The other two may have LS = 0, or an LS greater than zero.

[@Heiress983]

You just saved my graduation! Thank you!

[@Engineer4Free]

+Heiress983 Wow that's good to hear! Glad I could help! If you need any other tutorials you can find the rest that I made here: www.engineer4free.com/project-management Thanks for sharing your success story :)

[@ianpatrick23]

Great explanation!

[@Engineer4Free]

Thanks Ian! 👍

[@ulysseslanducci8708]

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[@donaldradaza3525]

can you make a sample video on how to make an equipment and manpower utilization schedule? thank you

[@Engineer4Free]

Hey thanks for the suggestion. Probably won't get around to it any time soon as I'm working on a different subject, but I'll keep a note of it for the future

[@Jamiewithtoast]

so the critical path is A, B, D, C, E, G, F, H? Or A, B, D, G, H? Surely you would miss completing C, E and F if this is the case?

[@RealGame101]

Thank you. That was really good. Saved hours!

[@Engineer4Free]

+Ricky Brown Awesome glad to hear it! You can find the rest of the PM tutorials I made here: www.engineer4free.com/project-management ^_^

[@saltypapi786]

So how much is the total slack time? 15 days?

[@Engineer4Free]

Total slack is a value given individually to each activity, not the entire project as a whole. It's the amount of time that any specific activity can be delayed, without delaying the finish date of the overall project.

[@flipsidekiller6135]

what app did you use to draw the diagram

[@mister4972]

Life saver is all I have to say................

[@Engineer4Free]

=)

[@sitimadihahtaib670]

thank you..very helpful for my study👍

[@dowhatwelike37]

Which app do you use to draw these tables? sir

[@Engineer4Free]

The full list of hardware and software that I use to make the videos is here: engineer4free.com/tools

[@Ramnath_Bhagat1]

extremely useful video . thanks a ton

[@nyklunglei6559]

Very good explanation. Thank you sir.

[@Engineer4Free]

Thanks nyk :)

[@kavitagupta6032]

Hii, video is amazing. Can you pls explain how to calculate independent and interferring float for this diagram.

[@Engineer4Free]

Mmmm, I just have some videos on general float, see numbers 13-15 here: engineer4free.com/project-management

[@kavitagupta6032]

@@Engineer4Free Thankyou

[@sondusalshaghdali8314]

Is it ok if my free slack was a negative number?

[@razered1899]

CAN the total float number in one box give different numbers??? or dose that mean a mistake was made in calculating?

[@Engineer4Free]

Each activity can only have one value for total float

[@CelestaleOfficial]

What is the free float of B, when E have predecessor of C and B.

[@Gedd85]

One of my lecturers teaches me using this formula FFi = min (ES i+1) - EFi. But I don't understand how to use it. What is min (ESi+1) stand for? Need some help..

[@Engineer4Free]

+Gled Gedion Maladou I'm unfamiliar with that notation, sorry. A quick Google search: www.google.ca/search?tbm=bks&hl=en&q=FFi+%3D+min+%28ES+i%2B1%29+%E2%80%93+EFi brought up a few textbooks that use it though

[@ianhayes9101]

+Gled Gedion Maladou Wouldn't that just mean the minimum ES of any of the successor nodes?

[@stanleymakazhe593]

Hey, what if you have 3 end nodes with different earliest finishs?

[@Engineer4Free]

Take the largest of those 3 early finishes and then use it as the late finish for all 3 terminal activities.

[@paulaplantita8458]

Awesome video. But please please can you upload the calculation for free float with lead-lag reltionships. There's literally nothing out there on the web for this. Thank you!

[@ababejama7505]

i love your examples thank you teacher

[@nourahahmed9841]

Thanx it really helpful☺

[@Engineer4Free]

Most welcome 😊

[@tumulpurwar8812]

hahah..cool ..u really deserve appreciation...nicely explained:)

[@Engineer4Free]

Thanks Tumul!

[@unfinished6404]

You r amazing! 👍

[@mkbhoir5923]

How to calculate Independent Float From this?

[@suzanpathan1603]

What's the formula for independent float

[@Imaangrycat]

TOTAL FLOAT - FREE FLOAT

[@thepriestofvaranasi]

He he he ha

[@lashinirabindrakumar6954]

very clear explanation. thanxx a lot

[@alipirzada2974]

better then my prof...

[@Engineer4Free]

+Ali pirzada Glad to hear its helping!

[@abedose]

this is reality for your info :) really he doesn't make even half of what you do :(

[@THENKINGMr]

hate to say that,but it is a damn fact

[@Chrissybabyboo1]

Hi. Do you have a gnatt chart for this network diagram

[@Engineer4Free]

Hey Chrissy, thanks for the comment. I didn't have one sitting around, but you made me realize that I should, so I drew one up and made a place on the website for clarifications like this. You can find the Gantt chart here: engineer4free.com/extras/gantt-chart Cheers :)

[@Chrissybabyboo1]

Thank you. :)

[@juniali123]

how can I watch your other videos, you did put any info

[@Engineer4Free]

+Syed Ali Hey, you can find the rest of my PM videos here: www.engineer4free.com/project-management

[@jammuKashmirpoint1974]

Good information ❤

[@rikishi555]

Thank you Sir! ☺️

[@Engineer4Free]

You're welcome Rick, thanks for watching!

[@ssdfgghsttuujkk5404]

great work man

[@Engineer4Free]

Thanks bru

[@kaitlynli7538]

thanks!!! very useful and clear!!

[@Engineer4Free]

+Kaitlyn Lai Thanks for the feedback! You can check out all the PM tutorials I made here: www.engineer4free.com/project-management Good luck!

[@سارهحربي-ب2ي]

Thank you 💗

[@Engineer4Free]

You're welcome!!!

[@himanshumittal5430]

Plz also make video to find independent float

[@sumindrabarod8]

Thank you 😊

[@adjmalosen6191]

Thank you sir. You're a life saver :)

[@ShehzadAkhtar2010]

Superb bro! Superb...! Thanks a lot...

[@Engineer4Free]

+Shehzad Akhtar ahah thanks for the feedback! You can find all 45 free PM tutorials I made here: www.engineer4free.com/project-management.html Good luck studying!!

[@SayantanM7]

thank you so much.. i think i will pass :D

[@mohammedtaha3834]

Good explaning thanks

[@Engineer4Free]

Thanks Mohammed!! 😁

[@ayazjankaka804]

u are amazing sir