Illustrating the influence of modelling on the decision making process, this bookhelps readers come to grips with a wide range of modelling techniques. The authors present these techniques in a straightforward manner illustrated by examples. They analyze the formulation and modelling of a number of well-known theoretical and practical problems and touch on solution approaches. The book also discusses the use of software packages in solving optimization models without going into mathematical details and complex solution methods. The authors draw directly from their experience to provide lessons learned when applying modelling techniques to practical problem solving and implementation difficulties.