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  1. TimPen

    Algorithm to maximise raw material

    Hi MajP Thank you very much. I have one last question (I hope) Your model allows a single stock length and two cut sizes. In real life I would have a single stock length with multiple cut sizes! I had a scenario today where I had one stock length and four cut sizes. Can you model be adapted...
  2. TimPen

    Algorithm to maximise raw material

    Hi MajP My sincere apologies! As mentioned in a previous thread, I have been away. I returned this morning, but yes I am still monitoring this thread and would love to see your solution
  3. TimPen

    Algorithm to maximise raw material

    I will look at this. I am away for the next three days, so my response will be delayed - but I will respond!
  4. TimPen

    Algorithm to maximise raw material

    OK Thanks I will wait for you!
  5. TimPen

    Algorithm to maximise raw material

    found this: www.dailydoseofexcel.com/archives/2005/09/12/cutting-stock-lengths/
  6. TimPen

    Algorithm to maximise raw material

    I can only say two things: 1. Brilliant 2. Thank you so much I really appreciate your assistance Bravo Now to figure out how to automate solver!
  7. TimPen

    Algorithm to maximise raw material

    Many thanks So now it makes sense and confirms that Excel can solve this using the solver. The question is now how much do you want to automate it? You could write the vba in either Access or Excel to set up the model or you can do it manually in Excel. Neither would be overly complicated, but...
  8. TimPen

    Algorithm to maximise raw material

    Many thanks My sincere apologies! I got the column headings "Boards Required" & "Strips Required" mixed up Attached is the corrected file http://www.mediafire.com/file/7gull4z4u7uszau/Cutting%20Examples.xlsx
  9. TimPen

    Algorithm to maximise raw material

    Many thanks http://www.astrokettle.com/pr1dsc.html They want to charge $1200! This is what they quoted me, and it is simply too expensive. I don't mind contributing, but this is too expensive I see my solution as a 1d. In order to visualize how you do this I will asks questions on the first...
  10. TimPen

    Algorithm to maximise raw material

    Many thanks Answers at end of each question 1) are all the strips the same length? In other words are they ripping it from a stock of a specified length (i.e. 4x8)and you get the full length? If so what is that length? Or can you choose the length? Yes the are the same length. I will need to...
  11. TimPen

    Algorithm to maximise raw material

    I manufacture wooden box’s and need to create a production order for the factory. The production order needs to include a cutting schedule so that the wood is cut to maximise usage (minimise waste) A box essentially contains 4 components. 2 sides, 2 lengths, 1 base and 1 lid. (The base and lid...
  12. TimPen

    Algorithm to maximise raw material

    Hi MajP You have hit the nail on the head! Many thanks. The wiki article explains what I want Now I need to find an Access module that does just this! Any ideas where I can find one. I am also happy to contribute towards it
  13. TimPen

    Algorithm to maximise raw material

    Hi MajP You are 100% correct. I need a fitting optimization model as you described! Here is a real example: The string is 2440mm in length It first needs to cut it into lengths of 442mm This will give 5 lengths of 442mm, with 430mm left over. The other lengths that need to cut are 142mm &...
  14. TimPen

    Algorithm to maximise raw material

    I have a piece of string which I need to cut into lengths. I need to determine the the number of cuts per lenght to minimise waste Say the length of the string is 100mm Example 1 I need lengths of 40mm, 20mm I would cut 2 of 40mm & 1 of 20mm Example 2 I need lengths of 30mm I would cut 3 of...
  15. TimPen

    Database speed degenerates over time

    I have found the reasons for forms being very slow to load. They include: 1. Having active filters on the form 2. Having combo boxes which allow users to navigate / select records If I remove these I don't experience and speed issues. To allow users to navigate / select records, I have a cmd...
  16. TimPen

    Calculated unbound field flashes #Error

    I have just changed the design of the subform and based it on a query, rather than a table. In the query I do the row calculation "TotalValue", and in the form footer I now have a Sum(TotalValue) This appears to work. Many thanks for the response
  17. TimPen

    Increase size of Pop Up form

    Thanks Aceman, but this does not work
  18. TimPen

    Calculated unbound field flashes #Error

    On a subform I have an unbound field, called TotalValue, =[Quantity] * [Price] In the footer of the subform I have another unbound field, called SumTotalValue, = Sum([Quantity] * [Price]) If I change records on the main form the unbound field called SumTotalValue sometimes flashes "#Error" This...
  19. TimPen

    Increase size of Pop Up form

    How can I set the size of a "Pop up" form using vba? When it opens, not all the fields are visible and I need to manualy increase the size of the form.\ Thanks in advance Tim
  20. TimPen

    Error 3049 when opening append query

    If I open the query in design view, and then open it in Datasheet View, it opens correctly!

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