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Calculation Help

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  • Calculation Help

    I am designing a stock control system for a client but can't seem to get my head around part of the problem. Designing a straight forward stock system is easy, however my client also uses raw materials (sheet metal, etc).

    For example my client has a pieces of sheet metal 10m long by 1m wide (he is only concerned about length remaining when it comes to stock control), he uses 2m length on one job and 1m on another which leaves him 7m. Now he has another job which requires 8m, the system has to figure out that the first sheet is too small and uses a new sheet which will leave 2m. Finally he has another job which requires 3m, the system must first check the used sheets to see if there is enough length available before using a new sheet.

    So I'm not sure what would be the best way to tackle this, anyone any ideas?

    I hope this makes sense??

  • #2
    Re: Calculation Help

    Assuming he only is concerned with even cuts of at least one meter it would seem to me that he needs sku's for each of the possibilities. 10, 9, 8, 7 etc.

    Inventory moves into the 10 meter sku as it is received. When a piece is first cut the whole 10 meter sheet is removed from 10 meter inventory, the cutoff portion is used/allocated to the job, and the remainder is moved to the appropriate shorter length sku. When the next job is started the system checks the shortest length sku equal to the job length for available quantity and moves up till inventory is found.
    There can be only one.

    Comment


    • #3
      Re: Calculation Help

      Hi Stan unfortunately it can be variable lengths down to the cm :(

      Comment


      • #4
        Re: Calculation Help

        Hi David,
        I am guessing that your storage system for these partial sheets it already putting them into groups. So Stan's guidelines should still work even if you use cm instead of meters. If a sheet is more than 6m but <= 7m, and you call this GRP7 then you should be be able to pull up the stock list for that group and select which sheet to use. I suppose a labeling system would also be needed for the department that has to pull the stock which gets moved as it is used.
        Robin

        Discernment is not needed in things that differ, but in those things that appear to be the same. - Miles Sanford

        Comment


        • #5
          Re: Calculation Help

          So one sku with a field for length. Searching for the smallest available piece is done with a lookupn() or lookupc() depending on the value you want to find such as an id_number or id_code and the necessary index.

          Looking up the closest match with either could result in a misleading match per testing. Needing a match to 6.8 meters would match 6.6 and not 7.2 when the 7.2 meter piece is what is wanted. A custom function that ordered the records descending and found the smallest big enough would probably be better.
          Last edited by Stan Mathews; 11-04-2014, 12:26 PM.
          There can be only one.

          Comment


          • #6
            Re: Calculation Help

            Custom function that operates on sample table. Both attached.

            piece_find(6.8) finds id "00002" for example.
            Attached Files
            There can be only one.

            Comment


            • #7
              Re: Calculation Help

              Hi Stan,
              I downloaded your table and added to an A5v11 adb but did not see any forms - did you make one? Or can't I view it in v11?
              Robin

              Discernment is not needed in things that differ, but in those things that appear to be the same. - Miles Sanford

              Comment


              • #8
                Re: Calculation Help

                No form. Import the function first.

                Then just go to the interactive and

                ? piece_find(6.8)

                My thought was that the application would have a button that called the function based on user input of a variable representing the length needed for a job.

                The function is quite simple.

                Open the inventory/stock table, order descending by length.
                Loop through the records storing the length in the function return value until the record doesn't meet the necessary length. Return the id of the last (least length) record processed.
                There can be only one.

                Comment

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