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Limiting factor example from chapter 6

AAnna10y ago
In the example the constraint is for executive chairs and in solution they are on x axis, whereas logically they should be on y axis. the solution if to plot this constraint on y axis is different. It gives a lower contribution. consequently also slack exists only for labour. What is the correct decision to plot the executive chairs on x or y axis and how to proceed in future questions? Thanks.
John MoffatJohn MoffatTutor10y ago#1
It does not matter in the slightest which axis you use for each product (I really do not understand why you say that logically executive chairs should be on the y axis - there is no logic involved :-) ). The final answer will be the same whichever way round you have your axes - it is completely irrelevant.
AAnna10y ago#2
I am sorry but usually we proceed from left to right, let standard chairs be x and executive be y. If it is from left to right, then the decision will be different. There is a difference in contribution of 15.
John MoffatJohn MoffatTutor10y ago#3
I am sorry, but you are wrong! You don't need to use the symbols x and y - it is more sensible to use symbols that more obviously represent the the products (I use S for standard and E for executive). It does not matter which axis you use for which product - the final solution will be the same. (This is not a maths exam!) In relation to your first question - there is no slack for either labour or materials in this example (how you show your axes makes no difference whatsoever to the solution. I cannot make a difference! The graph obviously is 'turned round', but that does not affect the solution at all). I do suggest that you watch the free lecture going through this example again!!
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