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Social Studies 26 Online
Karla:

How do we calculate total time and free float time? In critical path analysis.

Hero:

easy. Will only explain when you're online @Karla

Karla:

I'm online right now Are you?

Karla:

@Hero

Hero:

Sorry I missed you @Karla

Karla:

Now?

Hero:

Oh there you are. Is it possible for you to upload the question you're working on. Can you screenshot it from your textbook and upload it here?

Karla:

There is no option to upload the picture

Hero:

Oh but there is. It's called "Attach File". It is a set of buttons right below the typing box.

Karla:

I'm using mobile

Hero:

Oh. Well use a website like postimage.org to upload it.

Hero:

Then post the link here. That's what 99% of users usually do.

Hero:

Keep in mind I have a limited amount of time.

Karla:

Oh I've uploaded

Hero:

You have to post the link to the image here. I'm sorry you've never done this before. i don't know how to show you how to do this correctly.

Karla:

Yea I haven't

Hero:

c'mon Karla. You can figure this out. It's not a difficult site to use.

Karla:

I figured that out 😃

Hero:

nah you posted the wrong link.

Karla:

Oh

Hero:

You posted a link to the gallery not the link to the image.

Karla:

20181120-202432.jpg

Karla:

Oh I did that

Karla:

It's part 4 Calculate all free float and total floats

Hero:

Trust me, you still have not done it right. The link you posted is still the incorrect link even though QC processed it as an image. Whatever you posted kicked me off QC and I had to sign in again. Nevertheless, I have the image now.

Karla:

Oh I can see the picture without link here

Hero:

Yes Karla, as I said "QC processed it as an image". But trust me, you still have not posted the correct link. I don't know why you haven't figured it out yet, but it doesn't matter I have the image. Anyway what I want to say is that your book is using terminology I have never heard of before.

Hero:

It's non-traditional terminology. What is the name of this textbook?

Karla:

Peter stimpson and Alastair farquharson Cambridge international As and A level Business Coursebook third edition

Hero:

That explains it. It's international. I'll never be able to find it now.

Karla:

Oh

Hero:

It's okay, I'll try to do some research on these terms.

Karla:

Oh okay thank you!

Karla:

What terms I can tell you them

Hero:

I'm starting to figure it out. Hang on.

Karla:

Ok

Hero:

Let me ask, have you already created your network diagram?

Hero:

@Karla are you still here?

Karla:

Yea

Hero:

Okay, just checking.

Karla:

I tried to make one but I'm not sure that is correct

Hero:

Okay, how much time to do you have to work on this question. I have to start getting ready for work.

Karla:

5 min maybe What is the time in your country

Karla:

You can tell me the time when you are free I'll get online

Karla:

It is 8.44 pm here

Hero:

Okay. Basically, I won't be back for a couple hours. I should be back by 11:30 pm your time.

Hero:

And hopefully I'll have solved everything by then

Karla:

Alright Thank you! I'll get online

Hero:

Then I can explain it

Karla:

Ok

Hero:

See you in a couple hours

Karla:

Okay

Hero:

So if I ping you @Karla will you get an alert?

Karla:

No when I'll get online then I can see that

Karla:

Only

Hero:

You should either set up a gmail on QC then set it up to receive alerts.

Karla:

Oh I dont use gmail to often

Karla:

too*

Hero:

whatever email you use, you should add it to QC

Karla:

Ok

Hero:

Your email service should have a way for you to set up alerts

Hero:

Anyway, I have to go

Karla:

Okay Bye

Karla:

Hey!

Karla:

I'm back

Karla:

I am unable to make draw last part

Hero:

Hi

Hero:

I'm back as well. Let me put together a solution for this

Karla:

Hi! Ok

Karla:

You there?

Hero:

Yes sorry. I'm done

Hero:

I haven't done this in like 8 years so I had to re-familiarize myself

Karla:

Oh

Hero:

But I have the solution

Karla:

Great!

Hero:

Hero:

Let me know if you have any questions

Karla:

F must be completed before I commence

Karla:

So as F has no preceding activity shouldn't it be connected with first node

Hero:

Yes that is correct. It isn't connected to anything except I

Hero:

Do you see that this is the case?

Karla:

But If i remember that correctly when anything has no preceding activity it is connected with first mode?

Hero:

I only grouped it beneath A since both A and I have no preceding activity

Karla:

Node*

Hero:

But they are NOT connected

Hero:

Do you understand that F is only connected to I?

Karla:

Yea

Hero:

Okay great

Karla:

Ok

Hero:

Is that really the only question you have?

Karla:

Yea But I've another question in which I only need to calculate free float and total float So after this I'll do that myself

Hero:

Well, I think that now that you have the correct answer you should be able to calculate those things.

Hero:

I can help if necessary

Karla:

Oh Total float is LFT-duration-EST And FREE FLOAT= EST(next activity)-duration -EST (this activity) I dont get that what LFT or EST will we take? I mean of A,B,C,D...?

Hero:

And what does LFT and EST stand for. Your nation deals with completely different terminology so you can't use any acronyms with me.

Karla:

oh sorry EST=earliest start time LFT=latest finish time

Hero:

Yeah I don't get your notation either.

Hero:

are those dashes supposed to be subtraction symbols?

Karla:

Yep

Hero:

rewrite the formulas and put MINUS instead of dash

Karla:

Okay

Hero:

You can use acronyms now that I know what they mean

Karla:

Total float is Latest Finish Time(minus) duration( minus) earliest start time And FREE FLOAT= Earliest start time(next activity) (minus) duration (minus) earliest start time(this activity)

Karla:

Oh

Karla:

Okay

Hero:

Hmmm interesting.

Hero:

they want this for each node (A, B, C, D)?

Hero:

or for the entire project time

Hero:

@Karla

Hero:

Do they want these calculations for each node?

Karla:

Oh each node okay Then I'll do that

Hero:

No, I'm asking if that's what they want

Hero:

I don't know if that's what they want.

Karla:

Oh now I reread the question it says all free float

Karla:

Thank you so much!

Hero:

I'm lost lol

Hero:

But it says to calculate these values only for the non-critical nodes

Karla:

Oh yea So I'll find the non critical path and put the values in formula

Karla:

Right?

Hero:

Correct

Hero:

But actually you don't have to find a non-critical path

Karla:

Why?

Hero:

Just find the non-critical nodes

Karla:

Oh yea 👌

Karla:

Ok

Karla:

Thank you so much!

Hero:

Looks like the non-critical nodes are CDF and H

Hero:

How do you intend to calculate the Free and Total Float for node C for example?

Hero:

Show me your work for that

Karla:

Ok 1 min

Karla:

So total float is 4-2-4 Right?

Hero:

Where are you getting those numbers from?

Karla:

From your diagram

Hero:

I don't see 4 listed twice for node C

Hero:

Also, if you're getting them from my diagram, how do you know how to interpret those numbers?

Karla:

But what we make have 2 earliest start time and latest finish time

Karla:

But when we make we have 2 numbers *

Hero:

I never used any such numbers to represent "early start time" and "latest finish time"

Karla:

Oh so what u do?

Hero:

I only used two sets of numbers. Duration of Time To Complete a Particular Node By Itself and Total Project Time It Takes To Complete Node X Starting from Node A

Hero:

Something like that

Karla:

Oh

Hero:

X represents any node other than node A

Hero:

and F

Karla:

Oh we do like I send you the pic

Karla:

That is different way

Hero:

Yeah, I calculated it correctly.

Hero:

I know you do it differently but the answer is still correct

Karla:

Oh

Karla:

Ok

Hero:

Some of the calculations are unnecessary from my point of view.

Karla:

Ok

Hero:

But let me help you out

Karla:

Ok

Hero:

C and D each have two extra days of float time since it will take B 6 days to complete F has 6 days of float time H has only 1 day of float time 2 + 2 + 6 + 1 = 11 total float time

Hero:

11 total float days*

Hero:

Does that make any sense to you at all?

Karla:

You got H as 1 As G=12 And H=11 So difference

Hero:

Yes, I think you are interpreting correctly the way I am calculating Free Float and Total Float

Karla:

Oh alright

Hero:

Free Float C = 2 days of free float D = 2 days of free float F = 6 days of free float H = 1 day of free float Total Float 2 + 2 + 6 + 1 = 11 days total float

Karla:

Alright

Hero:

If I have to do it the teacher way, I usually run

Hero:

I rather do it the easy way

Karla:

Yea that was really easy way

Karla:

Thank you so much!!

Hero:

But it is important to manage the time properly because it is easy for the manager to think "Oh we have 11 days to play around with". That's plenty of time. Then if the employees think they have 11 days of float time, they won't do anything for 11 days and the project will surely fail. So don't tell the employees and monitor the time very closely.

Hero:

I think that actually answers one of the questions as well.

Hero:

Maybe you can think of a more technical way of explaining why the time must be monitored closely.

Hero:

Oh, you already did #3, nevermind

Karla:

No I didn't lol But I've to write advantages of critical path analysis so that are written in book

Karla:

And disadvantages

Karla:

With some additional detail

Hero:

If any delays occur, then you can push back the start time for the non-critical projects and delicate manpower towards ensuring the critical projects are completed on time.

Hero:

Also, post the feedback from your instructor regarding this particular question.

Karla:

Okay

Karla:

Thanks!

Hero:

You bet

Karla:

Yea

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