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03-20-2009 07:22 AM

I have a cassette of two sides the capacity of each side is 30 minutes ,and i want to record 8 pieces(songs) on it ,so that the difference between the time recorded on both sides is small as possible and represents an integer .

the time of each piece is as follows respectivley:

8 , 3 , 5 , 5 , 9 , 6 , 7 ,12

please i need a solution using__LINDO__ for this problem as quick as possible

This is an integer problem

the time of each piece is as follows respectivley:

8 , 3 , 5 , 5 , 9 , 6 , 7 ,12

please i need a solution using

This is an integer problem

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Posted in reply to deleted_user

03-26-2009 08:40 AM

If you want a solution using LINDO, why are you writing to a SAS/OR forum? If you want help using OPTMODEL, let us know.

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Posted in reply to deleted_user

04-19-2009 07:52 PM

You don't need SAS or LINDO for this. This problem is trivially solved using the Excel Solver. Solution is Side1: 1, 3, 5, 6 (time = 28) and Side2: 2, 4, 7, 8 (time = 27). Minimum time difference = 1.

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Posted in reply to deleted_user

04-26-2009 02:55 PM

yes i know i could use excel but i need to solve it using lindo .

i have a purpose for that and thanks

i have a purpose for that and thanks

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Posted in reply to deleted_user

04-26-2009 04:18 PM

Recommend searching the Internet, however you will need to open up your search arguments, based on a cursory search I performed. Possibly the Google search argument string may help get you started, now a month later than your original post as I noticed:

lingo lindo systems analysis time occupancy modeling

Good luck in your quest.

Scott Barry

SBBWorks, Inc.

lingo lindo systems analysis time occupancy modeling

Good luck in your quest.

Scott Barry

SBBWorks, Inc.

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Posted in reply to deleted_user

05-15-2009 08:30 AM

Hi OR fanatics!

I saw your discussion about the distribution problem of songs on cassettes and of course

it triggered me to find a solution:

I don't think this needs excel or LINDO but it is to be solved with a kind of dynamic programming

Solution is Side1: 5, 6, 8, 9 (time = 28) and Side2: 12, 3, 5, 7 (time = 27).

The difference is 1

By the way the proposed solution

Side1: 1, 3, 5, 6 (time = 28) and Side2: 2, 4, 7, 8 (time = 27).

may be not a feasible (valid) solution because there are no songs with length 1 ,lenght 2 and lenght 4

but if you can cut the songs it is.

Kind Regards,

Fred

P.S By the way I am looking for an OR position,

where you are faced with problems like these...so if anybody knows a possibility...

please let me know!.. Message was edited by: Fred

I saw your discussion about the distribution problem of songs on cassettes and of course

it triggered me to find a solution:

I don't think this needs excel or LINDO but it is to be solved with a kind of dynamic programming

Solution is Side1: 5, 6, 8, 9 (time = 28) and Side2: 12, 3, 5, 7 (time = 27).

The difference is 1

By the way the proposed solution

Side1: 1, 3, 5, 6 (time = 28) and Side2: 2, 4, 7, 8 (time = 27).

may be not a feasible (valid) solution because there are no songs with length 1 ,lenght 2 and lenght 4

but if you can cut the songs it is.

Kind Regards,

Fred

P.S By the way I am looking for an OR position,

where you are faced with problems like these...so if anybody knows a possibility...

please let me know!.. Message was edited by: Fred

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Posted in reply to deleted_user

05-26-2009 09:05 PM

In my solution, those are song indices, not times. Your solution is identical. Bob Agnew

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Posted in reply to deleted_user

05-27-2009 08:56 PM

Just to clear the air, my Excel Solver solution is available for download at

http://home.comcast.net/~raagnew/Downloads/Song_Assignment.xls. Bob Agnew

http://home.comcast.net/~raagnew/Downloads/Song_Assignment.xls. Bob Agnew