2. Methodology
This research proposed a NDEA model in a four-stage network that
consists of three main laboratory processes (pre-testing, testing and
post-test), which is unprecedented in the field of health care thus far.
Also due to the importance of undesirable inputs and outputs in
healthcare sectors, in the proposed model undesirable data is
considered. Then, a real case study of diagnostic laboratories in Iran
is given to demonstrate the effectiveness of the model. The benefits of
the proposed approach show that efficiency scores can help
administrators manage their deficiencies and ultimately improve their
business.