A Package Express Carrier Is Considering Expanding the Fleet of Aircraft

question 92

Essay

A package express carrier is considering expanding the fleet of aircraft used to transport packages.Of primary importance is that there is a total of $350 million allocated for purchases.Two types of aircraft may be purchased - the C1A and the C1B.The C1A costs $25 million,while the C1B costs $18 million.The C1A can carry 60,000 pounds of packages,while the C1B can only carry 40,000 pounds of packages.Of secondary importance is that the company needs at least 10 new aircraft.It takes 150 hours per month to maintain the C1A,and 100 hours to maintain the C1B.The least level of importance is that there are a total of 1,200 hours of maintenance time available per month.
(a)First,formulate this as an integer programming problem to maximize the number of pounds that may be carried.
(b)Second,rework the problem differently than in part (a)to suppose the company decides that what is most important to them is that they keep the ratio of C1Bs to C1As in their fleet as close to 1.2 as possible to allow for flexibility in serving their routes.Formulate the goal programming representation of this problem,with the other three goals having priorities P₂,P₃,and P₄,respectively.

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Definitions:

Stimulus Energies

The physical or environmental energies that an organism can detect and respond to, such as light, sound, and temperature.

Sensory Receptors

Specialized cells or nerve endings that respond to changes in the environment and transmit signals to the nervous system.

Sensation

The process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.

Visual Sensation

The experience of receiving and interpreting light through the eyes, leading to the perception of the surrounding environment.