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# Edexcel D1 - 17th June, 2016 [Exam discussion] watch

1. (Original post by nomophobia)
You round down because it needs to be in the feasible region as well as being an integer - it depends on the question

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Oh okay thanks

So I guess it's best to just check the value satisfies the inequalities for the feasible region

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2. Hi,
Is there any easy way to do a scheduling diagram WITHOUT drawing a cascade diagram/gantt chart first?
Thanks
Hasan
3. When do you say nodes or vertices and edges or arcs?
4. (Original post by HasanRaza1)
Hi,
Is there any easy way to do a scheduling diagram WITHOUT drawing a cascade diagram/gantt chart first?
Thanks
Hasan
I tried to search for a method yesterday, and I don't think there is, the only way is trial and error which would take too long. 😭
5. (Original post by HasanRaza1)
Hi,
Is there any easy way to do a scheduling diagram WITHOUT drawing a cascade diagram/gantt chart first?
Thanks
Hasan
Just look at the numbers from the early/late event time diogram and make sure you keep dependencies in mind? That's what I do at least!
6. D1 January 2016 Mark Scheme: https://drive.google.com/folderview?...1JvdlFTXzR0ZU0
7. When drawing a scheduling diagram, if we draw a Gantt chart first, should we cross it out? Or can we leave both there?
8. (Original post by target21859)
When do you say nodes or vertices and edges or arcs?
Nodes and vertices are interchangeable; use whichever. The same goes for edges and arcs.
9. (Original post by HasanRaza1)
Hi,
Is there any easy way to do a scheduling diagram WITHOUT drawing a cascade diagram/gantt chart first?
Thanks
Hasan
Found this a really useful video someone posted on here on that subject. https://www.youtube.com/watch?v=46SGt7O8So8
10. Well they don't take marks away, so I don't see how giving data which helps you but is not credited would leave you in any worse situation apart from time wise. Takes along time to draw a gantt for a 3/4 scheduling which may take 3/4+ mins anyway on it's own.
11. Anyone just to confirm - Prim's Algorithm is the one where you don't cross out arcs as you write them down, and Kruskal's is the one where you do? Right?
12. (Original post by hogree)
Found this a really useful video someone posted on here on that subject. https://www.youtube.com/watch?v=46SGt7O8So8
Thank you so much!!
13. According to Edexcel the grade boundary for an A this year is 71. I think it's something to do with them making the exams harder this year.
RIP everyone
14. (Original post by Zenphos)
According to Edexcel the grade boundary for an A this year is 71.
RIP everyone
Yeah heard this as well :/ Also only just found the new method for Scheduling Charts, not in books as they haven't been updated yet XD
15. (Original post by Zenphos)
According to Edexcel the grade boundary for an A this year is 71. I think it's something to do with them making the exams harder this year.
RIP everyone
Obvious lie. Grade boundaries come out inAugust and are always around the 60 mark for an A.
16. When filling out an algorithm table, how do you know when to skip a row and when not to??
17. (Original post by thesmallman)
When filling out an algorithm table, how do you know when to skip a row and when not to??
From my computing knowledge:
An algorithm table is basically a small computer program. When a value updates you just need to jot down it's current value. When the computer reads the value it only wants the most recent so there is no reason why a row would be skipped; unless for human clarity. I don't think it matters as long as it is in the right order.
18. (Original post by miless090)
Obvious lie. Grade boundaries come out inAugust and are always around the 60 mark for an A.

they have generally been in the range of 60-70 marks. There has also been reports on the edexcel webpage saying that the boundaries are increasing past this. I may still be wrong, but Edexcel are suggesting this.
19. (Original post by LeFatOaf)
Yeah heard this as well :/ Also only just found the new method for Scheduling Charts, not in books as they haven't been updated yet XD
Isn't D1 discontinued for reforms anyway as most of D1 is in Computer Science paper 2...
20. (Original post by Zenphos)
According to Edexcel the grade boundary for an A this year is 71. I think it's something to do with them making the exams harder this year.
RIP everyone
(Original post by LeFatOaf)
Yeah heard this as well :/ Also only just found the new method for Scheduling Charts, not in books as they haven't been updated yet XD
What? How did you find this? What new method!!?

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