Supply Chain Management

Changes of today's firm's competitiveness strategies from firms level to improved Supply Chain level causes increases in number and importance of Supply Chain studies in the literature. Variation between demand and orders is became the most important problem and most studied Supply Chain topic. This problem named in literature as Bullwhip Effect. Most common 11 factors effect on bullwhip is analyzed in this project. By improving the known Bullwhip Effect formula; lead time, review period, demand distribution, ordering cost, numbers of forecast periods are found as the factors which have significant effect on Bullwhip. In addition to this, for the use of similar Supply Chain researches, or real life Supply Chain projects, an improved excel spreadsheet simulation tool is prepared to test the proposed Supply Chain structures effects on different Supply Chain performance measures