Operations Research

FULLY SOLVED BOOK LASY 5 YEARS PAPERS SOLVED PLUS GUESS   

Unit I: Introduction to operations research – Evaluation – Definition – Scope – Model and limitations of operations research – Linear programming – Formulation – Graphical solution – Simplex method (only theory, no problem) – Dual problems in LP.

Unit II: Transportation problem – Northwest corner rule – Least cost method – Vogel‘s approximation method – Test for optimality – MODI method – Assignment problems – Hungarian method.

Unit III: Game theory – Meaning and characteristics – Saddle point – Dominanceproperty – Algebric and Graphical solution – Decision theory and its applications – Decision making under risk – Uncertainty in decision making – Mini max – Max mini – Regret – Laplace criteria.

Unit IV: Queuing theory: General structure of queuing system – Operatingcharacteristics of queuing system – Models – Sequencing problem – Processing N jobs through two machines – Processing N jobs through three machines – Processing N jobs through K machines – Processing two jobs through K machines.

 Unit V: Replacement and maintenance problems and its applications – Replacement theory – Replacement policy – Networks analysis – Programme Evaluation and Review Technique (PERT) – Critical Path Method (CPM).