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< <  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
> >  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each require 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farmer wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  

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Changed:  
< <  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
> >  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  

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Teaching Case Study: Student to complete  
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Teaching Case Study: Student to complete 
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< <  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
> >  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
 
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< <  *FORM FIELD StudentTasks*StudentTasks
1. Write AMPL files herd.mod , herd.dat and herd.run to solve find a feeding solution.Write a management summary of your feeding solution. Be sure to compare it to the consultant's solution.
What to hand in Your new AMPL files  
> >  *FORM FIELD StudentTasks*StudentTasks
1. Write AMPL files herd.mod , herd.dat and herd.run to find a feeding solution.Write a management summary of your feeding solution. Be sure to compare it to the consultant's solution.
What to hand in Your new AMPL files  

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Operations Research Topics: LinearProgramming, BlendingModelsApplication Areas: Farm ManagementContents  
Changed:  
< <  
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Problem DescriptionAdapted from a realworld problem When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each require 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farmer wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
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Problem Formulation  
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< <  Teaching Case Study: Student to complete  
> >  Teaching Case Study: Student to complete  
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Computational Model  
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< <  Teaching Case Study: Student to complete  
> >  Teaching Case Study: Student to complete  
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Results  
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Conclusions  
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Operations Research Topics: LinearProgramming, BlendingModelsApplication Areas: Farm ManagementContents  
Changed:  
< <  
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Problem DescriptionAdapted from a realworld problem When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each require 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farmer wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
Changed:  
< <  Problem Formulation  
> >  Problem Formulation  
Teaching Case Study: Student to complete  
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Teaching Case Study: Student to complete  
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Teaching Case Study: Student to complete 
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Application Areas: Farm ManagementContents  
Changed:  
< <  
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Problem DescriptionAdapted from a realworld problem When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each require 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain at least 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farmer wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
Changed:  
< <  Problem Formulation  
> >  Problem Formulation  
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< <  Teaching Case Study: Student to complete  
> >  'Teaching Case Study: Student to complete'  
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Computational Model  
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Results  
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Conclusions  
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1. Write AMPL files herd.mod , herd.dat and herd.run to find a feeding solution.Write a management summary of your feeding solution. Be sure to compare it to the consultant's solution.
What to hand in Your new AMPL files  
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Application Areas: Farm ManagementContents  
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Problem Description  
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When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113. 
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< Ready to Review >  
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1. Write AMPL files herd.mod , herd.dat and herd.run to solve find a feeding solution.Write a management summary of your feeding solution. Be sure to compare it to the consultant's solution.
What to hand in Your new AMPL files  
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Changed:  
< <  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table give a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  
> >  *FORM FIELD ProblemDescription*ProblemDescription*Adapted from a realworld problem*
When determining how to feed a herd of dairy cows, farmers need to take into account many different parameters, e.g.,
Farmers will often turn to farm consultants to help them make the best decision. In this case study we are going to analyse the decision suggested by a farm consultant. The following table gives some typical amounts of MJME (megajoules of metabolisable energy) required for a cow each day in order for it to produce various amounts of milk that day.
Cows get MJME from their feed, or more specifically the amount of DM (dry matter) in their feed. The next table gives a list of possible feed types, their cost, %DM, MJME per kgDM as well as their percentage of protein and NDF (neutral detergent fibre).
This month, a consultant has estimated that a herd of 350 cows each requires 180 MJME per day to produce 23 L of milk. For nutrition they need their feed to contain 17% protein and 32% NDF. He also estimates the farm has 1920 kg of usable pasture. His feed solution for each cow is given below.
The farm wants to know if this is the best possible solution. For more information on MJME, DM, etc see Farmingshow.com  Straggle Muster 113.  

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Revision 420080224  MichaelOSullivan
Revision 320080223  MichaelOSullivan
