During the concept selection stage, it is recommended to apply two cooling techniques (cooling technique A & cooling technique B) to a certain machining operation, however only one technique should be selected at the end. The following design criteria will be affected as follows:

o Total cost will increase by 26% in case of using A, with weighting factor of 12%.

o System reliability will increase by 42% in case of using A, with weighting factor of 32%.

o Energy consumption will decrease by 125% in case of using B, with weighting factor of 35%.

o Repairability will decrease by 6% when using A, with weighting factor of 33%.

1) Construct a decision matrix to choose between the two cooling techniques and apply the decision theory for the abovementioned conditions. Comment on your answers

2) Repeat (a) using equal weighting factors for all design objectives. Comment on your answers