Activity 8A : « Tables and chairs » model – Correcting an error

Lenght : around 10 minutes

One of your classmates has made an error. Help her find out what it is. Download the following file and save it to your GAMS project folder: modelEco_TablesAndChairs_error1.zip. Open the file in GAMS-IDE.

Run the model and find the error, then answer the questions.

Reminder of the problem statement :
« A company produces chairs and small tables using a stock of 16 wood units, 10 fabric units and employing a worker for 40 hours of labour.
1 chair requires : 1 hour of labour, 1 wood unit, 1 fabric unit.
1 table requires : 4 hours of labour, 1 wood unit.
A chair costs 15€, and a table 30€.


We seek to determine the production of chairs and tables which will help maximize the company turnover. »

How many errors are there ?

On which line does the solver detect the first error ?

What does this error correspond to ?


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One of your classmates has made an error. Help her find out what it is. Download the following file and save it to your GAMS project folder: modelEco_TablesAndChairs_error1.zip. Open the file in GAMS-IDE.

Run the model and find the error, then answer the questions.

Reminder of the problem statement :
« A company produces chairs and small tables using a stock of 16 wood units, 10 fabric units and employing a worker for 40 hours of labour.
1 chair requires : 1 hour of labour, 1 wood unit, 1 fabric unit.
1 table requires : 4 hours of labour, 1 wood unit.
A chair costs 15€, and a table 30€.


We seek to determine the production of chairs and tables which will help maximize the company turnover. »