Operations Research

Download Case Studies in Operations Research: Applications of Optimal by Katta G. Murty PDF

By Katta G. Murty

This textbook is constructed from special case experiences masking not easy genuine international functions of OR options. one of the total targets of the booklet is to supply readers with descriptions of the heritage and different history details on numerous industries, provider or different enterprises during which selection making is a vital component to their day-by-day operations. The ebook considers all tools of optimal choice making as a way to enhance performances. It additionally compares attainable strategies acquired through various techniques, concluding with a advice of the easiest between them for implementation. by means of exposing scholars to various purposes in a number of parts and explaining how they are often modeled and solved, the e-book is helping scholars enhance the abilities wanted for modeling and fixing difficulties that they might face within the workplace.

Each bankruptcy of "Case reviews in Operations examine: purposes of optimum choice Making" additionally contains extra information supplied at the book’s site on Springer.com. those documents include a short description of the world of software, the matter and the necessary outputs. additionally supplied are hyperlinks to entry the entire information within the challenge. ultimately there are venture workouts for college students to perform what they've got learnt within the bankruptcy, that can even be utilized by teachers as venture assignments of their courses.

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Extra resources for Case Studies in Operations Research: Applications of Optimal Decision Making

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Murty formulation (with specialized cuts and domination rules). 4 million using a MIP model (with Lagrangean relaxation sub-models). 5 million using a combination of heuristics and stochastic search algorithms. In the case study problem, the greedy method based on the greediness criterion GC1 gives better results than that based on GC2. Since fuel cost is over 94 % of the overall costs in the optimal solution, GC1 based on fuel cost as greediness criteria works better than GC2. Also since the case study problem is a realistic example of real world problems, we can expect the similar performance in general in practice.

Routes (Y10, Y7, Y2, Y12, Y30) and (Y30, Y12, Y10) are operated by locomotives L11 and L12. The round trip distance from yard Y10 back to yard Y10 through the yards Y7, Y2, Y12, Y30, and Y12 is 941 miles. 5 gallons of fuel per mile. Since the locomotive tank capacity is 4500 gallons, the entire round trip pair can be covered with a single filling in the round trip. This route-pair belongs to the R21 category. Routes (Y43, Y41, Y56, Y57, Y51) and (Y51, Y57, Y56, Y41, Y43) are operated by locomotives L7 and L8.

Murty • R22 are the remaining (in each route pair here, at least one refueling is needed in each direction; this set contains 12 % of all the routes covering 34 % of all the mileage in the problem). Routes (Y10, Y7, Y2, Y12, Y30) and (Y30, Y12, Y10) are operated by locomotives L11 and L12. The round trip distance from yard Y10 back to yard Y10 through the yards Y7, Y2, Y12, Y30, and Y12 is 941 miles. 5 gallons of fuel per mile. Since the locomotive tank capacity is 4500 gallons, the entire round trip pair can be covered with a single filling in the round trip.

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