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January 5, 2016 at 1:53 am
Hi Mr. Moffat,
I’d like to commend you for your concise and clear explanations on Inventory Control. After listening your lectures I was able to answer the majority of questions in my BPP revision kit on this topic correctly.
John Moffat says
January 5, 2016 at 8:00 am
Thank you for the comment 🙂
June 20, 2016 at 7:53 am
Thank you so much for your sound lectures ..i really enjoyed it. My question is, why talking about the certainty of not running out of stock by calculation using maximum lead time and maximum demand when there is already buffer inventory? what is the essence of buffer then since this is a safety measures to ensure we do not run out of stock?
June 20, 2016 at 3:05 pm
It depends on whether there is buffer inventory and the level of it.
Carrying a buffer does reduce the chances of running out of inventory, but it does not automatically mean that we can never run out.
December 5, 2015 at 8:29 am
hello sir, i wanted to make something clear. is these LIFO, FIFO and AVCO part of this chapter because it is there in the BPP book and therefore i was worried if it is part of the exams as well as the chapter and i have my exams coming Monday
December 5, 2015 at 8:47 am
No. FIFO and AVCO are dealt with in the F3 lectures on inventory (because they are in the syllabus for F3 also). LIFO is less important (but is in the syllabus) – at present however there is no lecture on LIFO.
December 5, 2015 at 2:09 pm
ohh thank you so much..and the lectures are brilliant..really helping me put with my study! 😀
December 5, 2015 at 2:19 pm
I am pleased that the lectures are helping you 🙂
May 21, 2015 at 10:20 am
To calculate the holding cost of inventory over a year.
Order quantity/2 is the average inventory throughout the year, ignoring any buffer inventory (which is what is usually the case in the exam). If there is buffer inventory, then the average inventory is higher by that amount throughout the year.
May 21, 2015 at 10:42 am
thank you very much sir.
May 20, 2015 at 2:01 pm
please help me on the following questions.
1.what is the difference between buffer inventory and safety inventory?
2.what is the formula for finding average inventory?
May 20, 2015 at 5:51 pm
1. Buffer inventory and safety inventory and different words for the same thing (buffer = safety)
2. The average inventory is (order quantity/2) plus any safety/buffer inventory.
May 21, 2015 at 8:02 am
thank you sir.
one more question please
when is this formula used? ‘(buffer inventory + order quantity/2)*holding cost per unit’.
September 25, 2014 at 6:11 am
Thank you for your efforts, it is really effective and help.
Could you please enplane once again Example 8. You deducted 210 from 480, but in descriptions we see that the re-ordering quantity is 1000 units each time. So for e.g. in the beginning we’ve got 1000 units, during 3 weeks we’ve sold 210, so we’ve got 1000-210=790 units left. Next order 1000+790=1790 – max inventory level
September 25, 2014 at 6:46 am
1,000 is the quantity that we order each time.
To be certain of not running out of inventory we need to place an order when we have enough to supply 120 units a week for 4 week. So we place an order when we have 480 left.
The minimum we will supply is 70 a week for 3 weeks – 210 units. So the maximum that will be left just before the new order arrives is 480 – 210 = 270. The new order is for 1,000, so the maximum inventory is 1270.
September 25, 2014 at 10:05 am
You took as base max 480 units. But from description we can also decide that base units in the beginning is 1000.
Anyway I understood the point.
Thank you for your explanation!
September 25, 2014 at 10:52 am
At the very beginning there are certainly 1000, but we will be supplying them gradually to customers and we will only place a new order (the reorder level) when there are 480 left in inventory.
September 25, 2014 at 11:07 am
Aha, absolutely! If in the very beginning we had 1000 units and if we would like to get max. level of stock than we should assume that next 1000 units should be supplied after 3 weeks (min. lead time). We do not need wait till stock will become to 480 units.
Sorry for dispute. I clearly understand that is not important topic but anyway 🙂
September 25, 2014 at 11:14 am
But we do need to wait. The whole point is not to carry more inventory than we need (because it costs money to hold more inventory) but at the same time to remove the risk of running out (and therefore turning away customers).
If the supplier could deliver instantly then we would wait until the inventory was zero and then place another order. Because there is a lead time, we have to order when we still have some left.
September 14, 2014 at 10:47 pm
I just want to ask if these lecture are suitable for Dec-14 semester. Yet these are really good and as per study scheme but i am still scared. Need to note i will give paper Based Exams.
September 15, 2014 at 6:05 am
Don’t worry – everything on our website is relevant for December 2014, both CBE and paper-based.
September 15, 2014 at 8:03 am
Thanks for your quick respond…that’s a relief.
July 2, 2014 at 5:30 pm
I cant seem to work out the answer. Please help.
Sky ltd wishes to minimise its inventory costs. At the moment its costs are $10 per order and holding costs are $0.10 per unit per month.Sky ltd estimates annual demand to be 15000 units.
What is the optimal reorder quantity (to the nearest 100 units)?
A.500 B.1000 C.1200 D.1700.
July 2, 2014 at 6:10 pm
You just use the formula on the formula sheet given in the exam.
D – the annual demand = 15000
Co – the cost per order = 10
Ch – the holding cost per unit per annum = 12 x 0.1 = 1.20
Using the formula you should get the EOQ = 500
Hope that helps 🙂
(PS This doesn’t actually have anything to do with my lecture on ‘reorder level’. Please in future ask this sort of question in the F2 Ask the ACCA Tutor Forum and I will answer you there 🙂 )
December 8, 2013 at 6:35 am
i just dont understand the requirement of this question ?????????????????????///
A company purchases 5,000 units per quarter at even rate throughout the year.
Each order placed with the supplier incurs a delivery charge of $20.
The annual cost of holding one unit in inventory is $5.
What is the minimum total of the inventory costs (order costs plus holding costs) per year?
December 8, 2013 at 2:05 pm
The minimum inventory costs occur at the EOQ.
So you need to calculate the EOQ using the formula, then you need to calculate the total inventory costs.
May 3, 2014 at 6:14 am
I am sorry but the total inventory cost = ordering cost + annual holding cost, right? then why the answer is 2,000? My answer is 2,080 which does not exist in the choices. Lol
May 3, 2014 at 9:47 am
The EOQ is 400 units (demand = 20,000 per year; holding cost = $5; order cost = $20)
With an EOQ of 400, it means 50 orders a year, so cost = 50 x $20 = $1,000
The average inventory is 400/2 = 200, so cost = 200 x $5 = $1000
So total inventory cost if $2,000.
I cannot imagine where 2,080 came from.
December 7, 2013 at 2:19 pm
December 4, 2013 at 6:49 pm
F9 in few hours. dec 2013….
November 25, 2013 at 8:15 am
plz can any tell me who is the examiner of f9 this time..
November 25, 2013 at 10:48 am
ACCA does not publish examiners names anymore
November 25, 2013 at 10:54 am
Admin is correct – the ACCA no longer publishes the examiners name. However the F9 examiner is the same person who has been the examiner for many years.
October 1, 2013 at 3:39 am
Why are these in F9 lectures if they are not examinable?
October 1, 2013 at 4:45 am
Inventory control techniques are examinable in Paper F9 as well as in F2.
Certainly reorder levels are unlikely, but it is so little that it is better to be safe than sorry.
The rest of inventory control certainly does get examined.
August 23, 2013 at 8:51 am
Thanks John for your lectures….I really really enjoy them. You make them really interesting especially with your irony..I love it!
June 18, 2013 at 6:16 pm
I cant find the examples in the notes? Please someone assist
July 17, 2013 at 3:49 am
Me neither. where is example 5,? cant find it on the lecture note. Many thanks for helping.
May 22, 2013 at 11:25 am
its informative I like it.i really also want downloadable revision video lectures f9.how can I get these?
May 22, 2013 at 9:10 pm
If you go to the F9 page you will find a link to all the F9 lecture available.
(Lectures can only be viewed online – only Course Notes are downloadable – it is the only way that we can keep this website free of charge.)
August 11, 2013 at 1:25 pm
I have downloaded the notes and printed them. Section on EBQ and reorder level are missing. It is only EOQ and JIT in the notes.
John would You mind going to the notes and double checking what we are saying please?
I really appreciate these lectures and am enjoying this course. Thank you so much.
August 11, 2013 at 1:53 pm
EBQ and reorders level are not exam unable in Paper F9 – that is why they are not in the F9 notes 🙂
August 11, 2013 at 4:12 pm
EBQ and reorder levels are examinable in Paper F2 and are in the F2 Course Notes.
They are not examinable in Paper F9 which is why they are not mentioned in the Paper F9 material.
May 16, 2013 at 7:12 pm
can I save the videos I download on my laptop so that I can review them? if yes please let me know how to do it, thank you
May 16, 2013 at 8:26 pm
No – the videos can only be viewed online – it is the only way that we can keep this site free of charge.
February 22, 2013 at 4:04 pm
Thank Your my Teacher
September 25, 2012 at 4:47 pm
You make life good! Well done OT!
July 12, 2012 at 2:31 am
what book are you using
June 23, 2012 at 2:34 pm
very informative:) thanks
June 12, 2012 at 5:09 pm
thank you i am enjoying this paper
March 3, 2012 at 7:36 pm
November 23, 2010 at 4:01 pm
He can still ask any of them, but the most likely always is reorder level and maximum inventory level.
November 23, 2010 at 2:00 pm
For the Dec 10 exam can the examiner only ask about reorder inventory level and maximum inventory level and none of the others i.e minimum level, average level, danger level?
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