Figure 1 The four stage network of a medical diagnostic laboratory
Figure 1 shows that the pre-test process consists of two stages: the
reception unit and the sampling unit. The pre-test includes inputs like
the number of active tests and the cost of consumables and outputs like
the average waiting time for sampling and the average sample transfer
time. The testing process consists of a stage called the test unit. The
testing includes inputs like the safety cost of test unit and outputs
like the number of the number of false tests. The post-test process
involves a stage defined the test results unit. The post-test includes
inputs like the staff wage and outputs like the number of responses of
the prepared tests.
The input, intermediary, and output variables are according to Table 5:
Table 5. The notation of input variables, Intermediary variables and
output variables