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    (Original post by lebron_23)
    Hey Arsey, sorry to annoy the crap out of you on both threads >.< but I was just wondering would I get penalised on Q1 for not drawing out my final matchings on the nodes they provided? I didn't see them on the next page and ended up drawing my own on the first.. Thanks as always.


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    Fine


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    (Original post by Nonomomo)
    Yes I don't. Do papers outside of UK differ from the one taken locally despite it also being from Edexcel; taken on the same day and time?
    They are setting two papers this year dependent upon time zone, to help reduce opportunities for cheating.


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    (Original post by Arsey)
    No, that is wrong. The LB is found from activities which must happen not may.

    Second bit is fine.


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    thank you arsey and for the quick sort I got the same as you but it was messy but the examiners are they experienced markers , they wont deduct mark for it right?

    and for question 1 the improved matching what did u have to show
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    (Original post by Arsey)
    Fairly reasonable paper I thought


    1. Matchings - pretty simple, although not breaking down the 2 required paths into separate part of the question, could cause problems.


    2. Quick sort and Bin packing - very easy, I thought it was odd how the first-fit decreasing didn't reduce the number of bins though


    3. Prim's and Kruskal's - very easy


    4. Dikky - harder than normal due to the sneaky part of the route. Quite easy to mank up b) too.


    5. Postie - standard. A common error on c) will be to repeat DE.


    6. LP - not easy but it never is. Part b) will be a bloodbath.


    alt to part b)


    no more than 1.5 times as many small as large


    for every 3 small you need at least 2 big




    7. CPA - Fairly standard but the backward scans not using the dummy paths will be a very common error. Gantt chart took too long. f) and g) will be poorly answered.



    Overall I would say it was a little easier than Jan, I would expect it to be around 63 for an A.


    This summer I will upload solutions to the following Edexcel papers:

    Core 1;
    Core 2;
    Core 3;
    Core 4;
    FP1;
    M1;
    M2;
    S1;
    D1;
    D2.

    I will try to get hold of some solutions for FP2; FP3 and M3.

    I don't do S2

    All papers will be uploaded in line with site rules (please don't PM me asking when I will I be uploading them).
    Hey,

    I am not sure if anyone has told you yet (or I am just blind) but you have not included activity "G" in your Gantt chart.

    Needless to say but I have to deduct 1 mark sorry lol
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    For question 7c, I only stated the effects that the delays would have, but I didn't explain why... I guess that would lose both marks? Thanks for the answers by the way!


    Same? Who we lose all the marks?
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    Thank you, much appreciated


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    (Original post by Arsey)
    No, that is wrong. The LB is found from activities which must happen not may.

    Second bit is fine.


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    Please Arsey did you get my quote, god bless you so sorry please forgive me
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    (Original post by otrivine)
    thank you arsey and for the quick sort I got the same as you but it was messy but the examiners are they experienced markers , they wont deduct mark for it right?

    and for question 1 the improved matching what did u have to show
    Should be fine. Not all markers are experienced but if they are unsure they can ask their team leader who will be.

    You can request a copy of your paper. It only costs about £10. Worth it if you think it has been marked incorrectly.

    Regarding the improved matching, you can either list the matchings or draw them.


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    (Original post by Arsey)
    Should be fine. Not all markers are experienced but if they are unsure they can ask their team leader who will be.

    You can request a copy of your paper. It only costs about £10. Worth it if you think it has been marked incorrectly.

    Regarding the improved matching, you can either list the matchings or draw them.


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    Yes I stated the complete matching like A=3,B=5 e.t.c for the 2 ? I did not draw them
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    Arsey thanks for putting up the mrkscheme

    2 questions
    1) in the bin packing do we have to state how much was wasted?
    2) for prism algorithm do they mark the distance matrix table ?

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    Why couldn't it be right?
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    (Original post by Arsey)
    Should be fine. Not all markers are experienced but if they are unsure they can ask their team leader who will be.

    You can request a copy of your paper. It only costs about £10. Worth it if you think it has been marked incorrectly.

    Regarding the improved matching, you can either list the matchings or draw them.


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    Yes I stated the complete matching like A=3,B=5 e.t.c for the 2 ? I did not draw them
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    I drew my gantt chart in pencil and i didn't get enough time to go over it in pen...is it alright? Will i lose marks because of this?😖


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    (Original post by Priya08)
    Arsey thanks for putting up the mrkscheme

    2 questions
    1) in the bin packing do we have to state how much was wasted?
    2) for prism algorithm do they mark the distance matrix table ?

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    No
    No


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    (Original post by bluelezah)
    I drew my gantt chart in pencil and i didn't get enough time to go over it in pen...is it alright? Will i lose marks because of this?😖


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    (Original post by otrivine)
    Yes I stated the complete matching like A=3,B=5 e.t.c for the 2 ? I did not draw them
    That's fine


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    (Original post by Arsey)
    That's fine


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    But why would I lose marks for the improved matching then? when i stated the complete mathcing , thanks
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    Thanks a lot for the mark scheme, 1 question...

    On Q 4a, I got node E, H and T Off by 1 (because I didn't consider GE ), which also caused the path to be wrong, out of the 6 marks would I lose all of them?
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    hi ARSEY
    for the quick sort i multiplied all by 10 to make it easier for me but after sorting i put the final answer back to decimals, would i loose mark for using this method?

    for the linear programming i only worked out what x and y is by substituting the equations i did not sub the numbers to find the total cost, how many marks do i loose ?

    on question 7 b i only said it would affect the total time because its a critical activity but i didnt say it would be delayed by 2days? would i loose all the marks for this?

    for 7f i said at time 12 FDEH would be going on, i know this is wrong but would i get a method mark?

    and for 7g I said the chart is better because it shows the activites that needs to be done by the workers.do i have any chance of getting a mark?

    THANK YOU
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    (Original post by Arsey)
    Fairly reasonable paper I thought


    1. Matchings - pretty simple, although not breaking down the 2 required paths into separate part of the question, could cause problems.


    2. Quick sort and Bin packing - very easy, I thought it was odd how the first-fit decreasing didn't reduce the number of bins though


    3. Prim's and Kruskal's - very easy


    4. Dikky - harder than normal due to the sneaky part of the route. Quite easy to mank up b) too.


    5. Postie - standard. A common error on c) will be to repeat DE.


    6. LP - not easy but it never is. Part b) will be a bloodbath.


    alt to part b)


    no more than 1.5 times as many small as large


    for every 3 small you need at least 2 big




    7. CPA - Fairly standard but the backward scans not using the dummy paths will be a very common error. Gantt chart took too long. f) and g) will be poorly answered.



    Overall I would say it was a little easier than Jan, I would expect it to be around 63 for an A.


    This summer I will upload solutions to the following Edexcel papers:

    Core 1;
    Core 2;
    Core 3;
    Core 4;
    FP1;
    M1;
    M2;
    S1;
    D1;
    D2.

    I will try to get hold of some solutions for FP2; FP3 and M3.

    I don't do S2

    All papers will be uploaded in line with site rules (please don't PM me asking when I will I be uploading them).


    With the linear programming I plotted the cost line wrong didn't have time to change it but did everything else right would I only loose 1 mark and also how many marks would I loose on the dykstras if I got 31 as the answer do you reckon ?
 
 
 
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