Hi teacher, thank you for your great help you always gave us, and really we so proud to be part of your community and i’m sure we won’t forget your efforts you gave us all the time.

Dear John,please help how can i differentiate the double rule and the formula rule ? In the example 3 first question, you choose to use the doubling effect rather than the formula? If i choose the formula and just calculate first 15 batches and subtract agin 14 batches, it won’t give me the same answer if i choose the doubling effect? So, how can i know when to choose the doubling or the formula? If i work both of them, will i get the same answer? Please help me .

In this example what you suggest will certainly not give the same answer, because the question does not ask for the time for batch number 15! It asks for the time to produce the next 15 batches, given that they have already produced 1.
So it is the total time for 16 less the time for the first.

You can always use the formula, but doubling is easier if the number of units comes as a result of doubling – which means it is limited to 2, 4, 8, 16, 32 and so on.

However you can only be expected to calculate it using the ‘doubling rule’ backwards, and I do show how to do it in my lecture working through the December 2014 Section B question 1.

Hi sir,
I have not seen any of your new lectures talking about how the come up with the learning rate if asked. Is this requirement still in the syllabus for march 2017 exams? If yes where can i find a lecture which will show how to calculate the leaning rate?

I thought it was in the lecture but it seems not – I will add a lecture on it.
(Although it is simply application of the doubling rule which is of course explained)

Thank you John for the free lectures – they are very clear & a great help! Laughed at the part in video (32:42) about us cursing you for an error – we can’t do that, you are helping us alot.
My observation is that the answers on times series and regression analysis were left in the notes I downloaded not sure if you have changed this for the new notes. Thank you once again

Abdulkadir says

Hi teacher, thank you for your great help you always gave us, and really we so proud to be part of your community and i’m sure we won’t forget your efforts you gave us all the time.

Dear John,please help how can i differentiate the double rule and the formula rule ? In the example 3 first question, you choose to use the doubling effect rather than the formula? If i choose the formula and just calculate first 15 batches and subtract agin 14 batches, it won’t give me the same answer if i choose the doubling effect? So, how can i know when to choose the doubling or the formula? If i work both of them, will i get the same answer? Please help me .

John Moffat says

In this example what you suggest will certainly not give the same answer, because the question does not ask for the time for batch number 15! It asks for the time to produce the next 15 batches, given that they have already produced 1.

So it is the total time for 16 less the time for the first.

You can always use the formula, but doubling is easier if the number of units comes as a result of doubling – which means it is limited to 2, 4, 8, 16, 32 and so on.

Bonno says

any lecture on calculating the learning rate

John Moffat says

No – I will add one soon.

However you can only be expected to calculate it using the ‘doubling rule’ backwards, and I do show how to do it in my lecture working through the December 2014 Section B question 1.

http://opentuition.com/acca/f5/acca-f5-dec-2014-exam-section-b-question-1/

Chris says

Sir how did you get 56.25 with your calculator ?

John Moffat says

I multiplied 75 by 75%

David says

Hi sir,

I have not seen any of your new lectures talking about how the come up with the learning rate if asked. Is this requirement still in the syllabus for march 2017 exams? If yes where can i find a lecture which will show how to calculate the leaning rate?

John Moffat says

It is certainly still in the syllabus.

I thought it was in the lecture but it seems not – I will add a lecture on it.

(Although it is simply application of the doubling rule which is of course explained)

elise says

Hi John,

Is there a lecture on how to find the ‘actual rate of learning curve which occurred? I am confused with the algebra part:

34.3 = 8 x (12.5 x R3)

4.2875 = (12.5 x R3)

0.343 = R3

R = 0.70

i understand all up to 0.343=R3, but don’t see how R=70??

Thank you!

John Moffat says

Yes – it is dealt with in this lecture!

You have written the first equation wrongly.

34.3 = 8 x (12.5 x R^3) (R^3 means £ to the power 3, i.e. R cubed)

So 0.343 = R^3

Therefore R = the third root of 0.343 = 0.7

Rhona says

Thank you John for the free lectures – they are very clear & a great help! Laughed at the part in video (32:42) about us cursing you for an error – we can’t do that, you are helping us alot.

My observation is that the answers on times series and regression analysis were left in the notes I downloaded not sure if you have changed this for the new notes. Thank you once again

John Moffat says

I will check – thank you.

And thank you for the comment 🙂

shaaz says

Thank you for such amazing lectures sir!

John Moffat says

Thank you for the comment 🙂