خلاصه ماشینی:
"Constant Return to Scale Model (CRS) Three operations research specialists called Charnes, Cooper and Rhodes measured efficiency practically through linear planning in 1978 that was called DEA, while there was no need to specify a production function form.
In the first model Tehran province is regarded as a general set including eight postal zones and analysis and trading unit that totally efficiency of 31 units (DMU) is measured.
66 19th Zone in Tehran Source: Authors Given to Table 5, postal branches which have the highest amount of technical efficiency and have been proposed as model for inefficient units are shown in Table 6.
According to the empirical results obtained, Alborz, Mazandaran, Isfahan, Tehran, Semnan and Bushehr branches in Model A and branches in 13th, 19th, 16th and 14th zones in Tehran province and Bushehr province were at the efficiency frontier in Model B given to constant return to scale and product orientation assumptions.
As a result, it could be suggested if inputs are adjusted or productivity of outputs is increased in proportion with conditions of each inefficient unit, inefficient units would improve at the efficiency frontier by modeling efficient units and considering the difference among efficient and inefficient postal units.
The Post Company should consider postal centers in Isfahan, Alborz, Semnan, Mazandaran and Tehran provinces as a basis to obtain technical efficiency in other provinces and branches and represents policy recommendations for other provinces by studying effective factors on their technical efficiency."