Quantitative Methods tools are not from any one discipline. Quantitative Methods takes tools from

different discipline such as mathematics, statistics, economics, psychology, engineering etc. and

combines these tools to make a new set of knowledge for decision making. Today, QM. became a

professional discipline which deals with the application of scientific methods for making decision, and

especially to the allocation of scarce resources. The main purpose of QM. is to provide a rational basis

for decisions making in the absence of complete information, because the systems composed of human,

machine, and procedures may do not have complete information.